"Before we go, I just...I just want you guys to know that I love you. And I don't regret anything that's happened. I'm not mad about the fake prophecy or the Talons stealing us, because without all of that, I wouldn't have grown up with you, and you're more important to me than anything. You're my brothers and sisters. You're my real family. So it was worth it, no matter what."
~Sunny, The Brightest Night page 267-268
Sunny lacks a barbed tail; a powerful and very important physical feature of SandWings. She also has moss-green eyes and golden scales, unlike other SandWings, who usually have pale yellow scales and obsidian-black eyes. This is because her father was a Nightwing named Stonemover, and she is thus a hybrid, half-SandWing and half-NightWing. Even so, she radiates heat from her scales and has the instincts of her tribe, such as a dislike of water, as shown in The Lost Heir, a small appetite, and a liking for very bright sunlight and warmth.
Sunny was brought as an egg to the cave by Dune, the SandWing guardian and a member of the Talons of Peace. Dune found her egg alone and hidden by the sand, hence the line from the prophecy "And hidden alone from the rival queens, the SandWing egg awaits unseen". She is said to be the last hatched, and upon hatching, she was revealed to have neither a venomous barb on her tail nor pale scales as a normal SandWing should have, leading to the assumption she was taken from the sand earlier than the right time.
During her captivity by the guardians, Kestrel, Webs, and Dune, she was the only one content with her life. She was also subject to exclusion because, by accident, she told Dune that the dragonets were planning on building a tall rock tower to climb on so they could look through a sky hole to the world outside. Later on, Morrowseer, the deliverer of the prophecy, came to the cave. Upon attacking Tsunami, she lashed out to defend her. When Glory was deemed an unsuitable substitute for the SkyWing egg, she was the most unsure of the situation. Eventually, Clay left to save them, and Sunny aided in freeing Tsunami, who had been chained up so she could not interfere with the plot to kill Glory. However, due to Clay and Tsunami's actions, they were all captured by Queen Scarlet.
During their spell in the Sky Kingdom, Sunny was kept separate in a birdcage that was hung over the feasting hall. When Peril told Clay where Sunny was, Peril clamed said she was just fine and was eating like a queen. She was also making friends with all the SkyWing guards, which she found disgusting and unnatural. Sunny was intended as a gift to Burn, because of her oddities. She was subject to Clay befriending Peril, due to her isolation, and was not present during any of the fights, only to reappear after Peril burned through the bars of her cage. She was thrown off by Tsunami and Glory's trick to get Clay to apologize for what he'd said, wondering why they would do "such a nasty ugly thing." Sunny eventually traveled with them towards the Mud Kingdom in the search for Clay's parents, and also left with the group to find Tsunami's mother, Queen Coral.
Sunny was with the other dragonets while searching for Queen Coral. She was the first to hear the wingbeats of a passing SkyWing patrol and followed Starflight into the trees. When Tsunami attacked a SkyWing soldier, fearing he'd seen Sunny's tail, Sunny was upset and horrified at what the SeaWing dragonet had done. They spent the night in a cave, and the next morning when they were headed to the Summer Palace, Sunny and Clay were the only ones blindfolded. Clay didn't mind, while Sunny hated it. At the palace, she was kept prisoner along with the other dragonets, excluding Tsunami.
After the cave flooded and Tsunami arrived with Auklet's egg, she asked Sunny to keep it warm, which she did. When they first met Blister, Sunny was frowning at her. After Tsunami revealed that Kestrel was dead, Sunny was distraught and extremely upset, but happy that at least Webs was still alive. She was also unhappy about Whirlpool's possible accidental death at Anemone's talons.
Sunny traveled with the other dragonets and Webs through the swamps of the Mud Kingdom. She was the first to disappear when the RainWings shot the dragonets with knockout darts, and was found soon after by Glory and Starflight, trapped and asleep in a net with Clay, Tsunami, and Webs. Later on, she was shown to be very fond of Silver, Glory's pet sloth, though Silver was more fond of Glory than her.
When the dragonets went to the Kingdom of Sand via the NightWing animus tunnel, Sunny seemed to be right at home. After Blaze came to meet the dragonets, she remarked that she thought Sunny would be 'prettier'; Sunny asked her how to heal a SandWing's venom, and Blaze carelessly told her about the healing cactus juice. Once the dragonets got back to the tunnel, Sunny went to retrieve a cactus arm for Webs, but had trouble breaking one off due to her size; Glory remarked that it looked like she was "trying to tango with a cactus". Sunny did not participate in Glory's rescue from the NightWings, but watched the queen competition with Tsunami.
Sunny was a very major character due to Starflight thinking about her throughout the book, and he finally told her he loved her, which surprised her. She said she loved Starflight back, but only like a brother. She told Starflight to kick some NightWings and free the captive RainWings. Starflight also became close friends with Fatespeaker, and later Fatespeaker fell for Starflight.
When the volcano was about to erupt, Morrowseer was the last one to show up at the portal to the Rainforest Kingdom, and told the dragonets that the prophecy was a fraud. Sunny at first forced herself not to believe him, because she believed that it truly was her and her friends' destiny to stop the war. When she realized he was telling the truth, she furiously ran back through the portal, crying the whole way. Starflight thought he had never seen her so upset. Morrowseer tried to follow her, but Starflight, Fatespeaker, Tsunami , Clay, and Glory got in his way.
At the very end of the book, Starflight thought he felt her scales pressing against his before he was hit by a sleeping dart, though he was blinded and could not see her.
Sunny run out of the portal from Morrowseer, upset the prophecy wasn't real. When she emerged, she noticed that Clay and Starflight had arrived, and Starflight had been badly injured. The RainWings panicked and Sunny jumped forward, trying to get through, when Preyhunter, Fierceteeth, and Strongwings grabbed her and pulled her back into the foliage of the rainforest.
They planned on using Sunny for trade so they can steal the rainforest. Sunny tried to stop their plans by making herself look useless, however, this plan didn't work. When the NightWings talked about which SandWing queen to auction Sunny off to, Sunny bit Fierceteeth on the vulnerable spot on her tail and took off through the outskirts of the RainWing village. Thinking she can solve the problem all by herself, Sunny followed the NightWings. When they took a rest stop, Sunny was able to steal their Obsidian Mirror. She then continued to follow the NightWings to the Scorpion Den.
The NightWings take many more stops during their journey, and Sunny wondered why. When they finally get to the Scorpion Den, she meets Six-Claws and Thorn, and finds out Thorn is her mother. However, after a short reunion, Thorn is forced to answer a call for help, and Sunny is left with Qibli and Six-Claws. When she awakes later that night, she and Six-Claws head outside of her mother's tent, only to be stopped by Addax, who threatens to kill Ostrich, Six-Claws' daughter, if Sunny doesn't come with him to Burn. After finding out that Addax is doing this to get his imprisoned family back, Sunny agrees to go with him in exchange for Ostrich.
While imprisoned in Burn's Stronghold, she meets Smolder, Burn's brother and ally, who takes her to the weirdling tower for her imprisonment. In there she meets Smolder's pet scavenger, Flower, as well as Queen Scarlet. The Outclaws later rescue Sunny, and Peril helps Scarlet. Thorn demands to see a stuffed NightWing, and tells Sunny she is half NightWing. Sunny then leaves her mother to go back to the rainforest.
Along the way, a storm forces her to take refuge in the caves on Jade Mountain, where she meets her father, Stonemover, and ends up telling him that she is his daughter. The next morning, Sunny returns to the rainforest and is reunited with her friends. She comes up with a plan to end the war and everyone agrees to it, Tsunami most reluctantly.
Tsunami and Sunny send a message to Blister through the Talons Of Peace; she and Clay then send a message through the MudWings in their dreams to Burn. They also get word to Blaze via the dreamvisitor Sunny receives from Holler and Fluffy.
When the three SandWing princesses gather at Burn's stronghold, Blister's gift to Burn, two dragonbite viper, kills Burn and attacks Clay. Peril unrealistically burns out the venom, saaving Clay's life.
While Blister and Blaze are fighting, Sunny finds the Eye of Onyx, with Flower's help, located inside of Queen Oasis' skull and hands it to Thorn. Enraged, Blister tries to take the Eye of Onyx, but it shocks her to death on contact, where she bursts into a pile of black dust. Sunny pronounces Thorn queen, and the main plot comes to an end.
A month later, it is stated that Starflight has learned to fly blind and that he and Sunny had discussed their relationship back in the rainforest. Sunny had told him that she didn't love him like Fatespeaker did, which he reluctantly accepted. They, along with the rest of the dragonets, she discusses plans for an inter-tribal school on jade Mountain.
Sunny, as her name implies, has a very bright, optimistic personality, and always sees the positive side of everyone and everything, although that sometimes makes her seem unintelligent. This has caused her to question herself, as she often sympathizes with her captors despite knowing their intentions for her.
She is a strong believer in fate and signs. To her, everything happens for a reason.
She was was content with her lot in life and was the only dragonet that was convinced their guardians were doing the right thing, and had no desire to escape. Sunny had no fear to defend her friends, as she attacked Morrowseer when he tried to measure up Tsunami's worth, and pounced on Riptide when he tried to kill Clay. Even though she is small, she can attack with sheer ferocity.
She also has a tendency to talk a lot, and even though she means well, the other dragonets know better than to tell her secrets until the time is right. For example, once she accidentally told Dune about a secret plan to escape the mountain.
Sunny also values peace. In The Hidden Kingdom, Sunny had mentioned that she liked the "RainWings|RainWing way".
She kept her belief of the prophecy even when Morrowseer said it was fake.
She is also shown to be annoyed and frustrated by how everyone thinks she's just a sweet little dragonet and not much else, and is willing to put her life in danger to prove it. She debated getting mad at Tsunami having said "[She is] a cute furry thing." In The Brightest Night, her vexation towards this even causes her to choose to follow Fierceteeth, Strongwings, and Preyhunter, the three NightWings whose clutches she had just escaped, as opposed to joining her friends back in the rainforest.
Sunny is one of the only dragonets who doesn't mind Starflight's lectures, whereas the others are usually annoyed by them. In The Dark Secret, Starflight confessed his love for Sunny, but Sunny only loves him as a brother. Eventually they decide to stay as friends.
Towards the end of The Dark Secret, when Starflight and Fatespeaker brought Flame to the rainforest, Sunny approached the NightWing and told her she liked the bracelet-like pattern of silver scales on her foreleg. Fatespeaker responded that she was about to say she liked the way Sunny looked, and that all the SandWings she'd met were 'sort of pale and dusty-looking'. They became good friends the first time they met. Sunny felt mild feelings of jealousy towards her, but then later encouraged Starflight to be with her.
Sunny has been shown to care about Clay. In The Hidden Kingdom, Clay said that he had 'dibs on sleeping next to Sunny', although this may also be because SandWings have naturally warm scales. She didn't have any other reaction than to beam at him. Sunny also respects the MudWing and sees him as the bigwings of the group. She also seems to rely on him to fix problems she can't solve on her own. Starflight claims that Sunny trusts Clay the most.
Sunny is often annoyed that Tsunami thinks of her as just as a silly, naive younger sister. However, she knows that Tsunami cares about her, and looks up to her as a sister figure.
"To be fair, the Talons were just keeping us safe."
"Even Sunny? What's that supposed to mean? I'm brave! I'm brave all the time!"
"Glory! You have a cute furry thing! Can I hold it, please, please?"
"Right. Here I go, la, la, la, Queen Oasis of the SandWings. I so very important and, uh - royal - and stuff."
"We're dragons, not caterpillars. We can do things differently if we choose to."
- Sunny has a sharpened sense of hearing, like the SandWings.
- Sunny developed a fighting technique similar to pressure points, where she stabs her harmless tail into her opponent's back, causing her victim to stiffen. She also rolls up into spiky balls and bites on the vulnerable part of the tail.
- Sunny is the only one of the dragonets to have met both of their parents.
- Her tongue is not colored black, but a reddish shade, which might be an error or one of her hybrid traits, like her scale color.
- The illustrations by Joy Ang show her muzzle being more elongated then a SandWing's. This is either an error, or due to her NightWing blood, as they possess similarly shaped muzzles.
- Sunny is the only known official hybrid character so far.
- Thorn had had in mind that Sunny would be named "Beetle".
- She is technically a SandWing princess now, since Thorn has been officially declared queen. However, Sunny herself does not seem to ever want to be queen.