Akina is Kinka’s twin sister, possessing an extraordinary memory. She recalls every past transaction entirely by mental calculation. For her, business is all about speed!

アキナはキンカの双子の妹　記憶力が凄まじく　これまでの取引履歴を全て覚えていて　なおかつそれはすべて暗算だ　商売とは速度である！