Hisca Aiheap

Hisca Aiheap (ヒスカ・アイヒープ) is a major character in Tales of Vesperia: The First Strike. She works for the military as a knight within the Niren Corps, serving alongside Yuri Lowell, Flynn Scifo, and her twin sister, Chastel Aiheap.

History
Hisca is a female knight senior to Yuri and Flynn, and is the older than her twin sister Chastel. She often gets on Yuri's case due to his impulsiveness. Despite being identical to Chastel, the two have vastly different personalities.