The following article contains information that may be of great importance in the series, read at your own risk.
She is a fair-skinned girl of medium height, with long dark brown hair, she also has a threatening look on her face. Her dress not change much, which is her school uniform.
When she is A, she wears a black cloak and her face resembles an Asian baby. When using her stick, her emblem is the angstrom sign Å.
She is a cynical girl with an aura of malice, she tries to take advantage of the situations which she finds herself in. She is not afraid of being threatened, and uses her knowledge to manipulate people. She is also quite intimidating as when she mentioned "magical events" to Hyoka Nagatsuki when she and Tsurara just discovered Mahou Shoujo Site. It is also shown she is quite caring when hooks nagatsuki was stabbed in the chest, and after showing her some tough love by slapping her face and asking if it is really ok to die in a place like this.
For now we don't know any misfortune in her past but she did told Hyoka Nagatsuki that she received a stick from a different route from the Magical Girl Site.
Ever since then, she has undergo an experiment to investigate the site under her Magical Messenger identity "A".
Sticks Given Edit
- Conductor's Baton to Touko Arareya.
- Unknown stick to Tatsumi Karasuma.
- Unknown stick to Ryuto Saibara.
- Unknown stick to Tsubasa Hisamatsu.
- Fencing Stick to Henchman.
- Crossbow to Henchman.
Victims of Sticks received from A Edit
Thanks to her stick that takes form of a hair dryer, she can return objects or people back to the initial place where they were.
She can produce soundwaves that can destroy anything, it was seen to be used for defense but possibly it can also be for offense. She can also teleport to a short distance with the soundwaves.
- Her ability has some similarities with Alice's Rewind.
- Iso means "island" and Ko means "child".
- It's confirmed that she's alive and well in chapter 85 and is currently with Kichiro Misumi, though It is not known whether or not she is either against him or with him considering they only said a few words in that short diologue.
- Her face/mask is based on Noh, commonly used as an accessory in dramatic Noh performances.
- She had a lot of sticks, the reason why she gives them is because she wanted to investigate the site, how she got them is unknown.
- Her surname "安城" means "Peaceful Castle".
- In Chapter 9 Isoko said “I'll see you in another dimension!” A reference of the popular manga and anime series, Dragon Ball Z.