稻垣巧克力

双胞胎姐妹。 美滨学园姐妹校"京船樱丘"的SORD（特工）。 两人都出身阿拉斯加，曾协助公权力机关打击走私毒品和武器的经销商及俄罗斯黑手党。 妹妹巧克力似乎以前和玲奈关系很好。

摘自本作简介中该角色的段落

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 official site]

简介来自 VNDB