稲垣 チョコ

Twin sisters, and students at one of SORD’s other campuses, Keihin Sakuragaoka.
The two agents hail from Alaska, where they used to assist the security services in cracking down on drugs and weapons smugglers and the Russian mafia.
It seems that the younger of the two, Choco, was once good friends with Rena.

"I was just trying to liven up the atmosphere a bit! Guess it didn't work, huh."

From url=http://grisaia-pt.com/en/index.htmlofficial site