Yamagami Erina

Yamagami Erina (山上絵理奈) 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.

Appearance
Yamagami is described as a middle school girl with wavy black hair.

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.

Honey Queen Arc
On August 5th, when Kinuhata Saiai infiltrated one of the illegal casino run by Honey Queen's support organization in School District 22 as a new employee, she was tasked with helping a manager dispose of Yamagami, who had been caught after posing as a visitor. Yamagami had been unaware that it was a casino, having been investigating tax evasion through unreported income. Having heard of a large safe being transported into a defunct bowling alley, she was given the job to investigate what was going on with some Anti-Skill officers supposed to be supporting her (Kinuhata suspected that they sent her in without telling her the risk). Although she was after the illicit money safe and didn't get any details on the people, Yamagami managed to extract data from the office computer but didn't have time to read it.

After speaking with Yamagami, who provided her with the small flash drive she had concealed with the data from the computer, Kinuhata managed to fake her death and free her with help from Frenda Seivelun, who had also infiltrated the casino staff.