Eirin Yagokoro (EntityTopic, 7)
From Compile Worlds
Eirin Yagokoro is a Touhou character who made her debut in Imperishable Night.
One day Kaguya came to her and was all like "yo, i wanna be immortal", so she made the Hourai Elixir for Kaguya to drink. This resulted in Kaguya being exiled from the moon. Decades later, the exilers and Eirin come to pick her up, but she thinks the moon stinks like cheese, and so, Eirin killed the people she hung out with on the way, and decided to tag along with the princess. Somehow she then became the master of all rabbits, notably Reisen and Tewi. As you might imagine, this makes it REALLY DIFFICULT to screw with Touhou Mother's story wherever Reisen's concerned...
Also, she has a really long...... corridor. What were you expecting me to say?