Legion of Keybearers
|Home World||Latched Division|
Chelsea Onn was born and raised in her homeworld of Festival of Lights. At the age of 11, she had the Keyblade passed onto her by an unknown wielder. Fearing this new power, she kept it a secret until the power manifested itself at age 13, at which point the Keyblade Master at that time tracked her down and reassured her power was a blessing and not a curse. From then on, she went to live in Latched Division where she trained in the Keyblade arts, eventually passing her Mark of Mastery exam at age 21.
- Onn's reflected real-world nationality is Irish.
|Kingdom Hearts: Amelioratory Benevolence|
|Vylinn - Ryed Raevin - Xaras Cullen - Absolon Laurent - Cheiko Miyakawa - Noia Exercir|
|Legion of Keybearers|
|Master Onn - Ciaran - Grace - Jaysen - Salem|
|Cruoris - Morsus - Obscurum - Veritas - Lux - Nullesspes - Irritum - Adimere - Insiminy|
|Xianlian - Mexrion - Yixeh - Axylyn - Sohtxin - Zounyx - Uxew - Vulixion - Xeiss - Servitex - Kalyxo - Keylix - Noxulous - Invlyxn|
|Junoh - Isis - Seraphim - Noxjuh - Takh|
| Sunset Horizons - Shadow Valley - Fortress of Illusions|
Serene Villa - Empire City - Latched Division - Riviere Armour - Reverent Prefecture - Hometown - Secluded Haven - Festival of Lights - Blackwater Fen
|End of Wars - Obsidian - Bloodlust Mech - Dreamslayer - Prudence - Gears of Fate - Shattered Theory - Reich|
|Abilities - Last Campaign - OST - The Pact - Rave - War of Worlds' Hearts|