- "Intelligent yet taciturn, she fearfully erects walls to hide her true self. Her greatest fear is emotional pain."
Thin and of average height, Chieko has styled dark brown hair and thick-rimmed black glasses. She wears her school uniform, which consists of a short-sleeved white top, green neckerchief and skirt, knee socks, and black mary janes.
Extremely shy, Chieko at first glance would seem like one of the most unlikely candidates for Pact Wielder. Her lack of physical strength and overall clumsiness often holds her back in battle, but she makes up for it in terms of intelligence. She is far and away the smartest of the Wielders, enjoying both reading and mathematics as hobbies. Her quiet and reflective nature ensures her lack of friends. She also suffers from androphobia.
- Chieko's reflected real-world nationality is Japanese. It's a pun namesake from Shokojo Seira.
|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|