Iyo is one of the three creatures from AniYoko, known as "the Happy AniYoko Trio", who frequently visit Ami through the door in her floor. She looks like a stuffed rabbit, and can use a sort of energy discharged through the space between her ears for all kinds of effects. She can also store objects and liquids in her ears, to be dispensed as needed. Although she always tries to act cheerful and cute, she is frequently selfish and vain. She also has the habit of dying when abused or neglected, only to return to life when a suitable apology is made. Her date of birth is the 4th of January.