Sai debuted during the attack on Izumo Inn when she together with Uzume and Shi tried to steal a Jinki from Minato on Higa Izumi's orders. During this assault she was badly injured by Homura but nonetheless she was able to pull out enough strength to launch one last attack towards Minato before she shutdown. Uzume shielded Minato and took her lethal blow for him.
Sai is a Sekirei with blonde short hair. She is wearing a black leather top up from her belly and leather bloomers and stockings.
Sai seems to be of impatient character and can be angered easily. Her comrade Shi also mentions that she gets easily annoyed.
Abilities and PowersEdit
Sai fights with long strings between her fingers using them like a whip, on top of her hands she has blades attached to these strings. Most likely to compensate for the disadvantage of a whip in close combat.