Yamagami Erina

Yamagami Erina is a character introduced in Toaru Anbu no Item. A member of Judgment, known to have been active at least one year before the main story, she inadvertently crossed paths with Item during several dangerous investigations.

Enemy Item Arc
Around the time of Item's infiltration of the Colosseum on July 7th, Yamagami Erina had somewhat ended up a contestant and was saved by Mugino Shizuri from a white tiger while Mugino was pursuing members of the Enemy Item, being yelled at when she tried to thank her as Mugino resumed her pursuit.