Discretion was a NightWing of unknown gender featured in Runaway. They were possibly a diplomat or a guard, sent to the Ice Kingdom along with Foeslayer and her mother, Prudence. They were mentioned to have been very confused as to why they were leaving the Ice Kingdom so rapidly. It is not known what happened to them after they escaped with Starclaws, Prince Arctic, Foeslayer, and Prudence to the original Kingdom of Night when the IceWings discovered Arctic and Foeslayer's forbidden love.
- Their name refers to the fact that one is able to talk without exposing important information. This hints that Discretion may be a negotiating dragon along the diplomat NightWings.
|Queens/Kings|| Present: Queen Glory • King Darkstalker • Queen Battlewinner
Historical: Queen Vigilance
|Jade Mountain||Starflight • Fatespeaker • Moonwatcher • Mightyclaws • Mindreader • Fearless • Bigtail|
|Deadlyclaws • Deathbringer • Eclipse • Farsight • Fierceteeth • Mastermind • Morrowseer • Obsidian • Preyhunter • Quickstrike • Secretkeeper • Shapeshifter • Slaughter • Starflight's Daughter • Stonemover • Strongwings • Vengeance • Wisdom|
|Allknowing • Clearsight • Discretion • Foeslayer • Foreseer • Jewel-eyes • Listener • Morrowwatcher • Prudence • Quickdeath • Starclaws • Swiftwings • Thoughtful • Truthfinder • Tunesmith • Vision|
|Hybrids||Darkstalker • Whiteout • Eclipse • Fierceclaws • Shadowhunter • Sunny • Firefly|
|Kingdom|| Night Kingdom: NightWing Fortress • NightWing Tunnels|
|Society||The NightWing Exodus|