Ennichi is both healthy and happy-go-lucky, which makes it very easy to approach her with treating capturing her like a game, so she'll often readily accept being tied up. Since she's almost always wearing her sweater, a chest-emphasizing shibari is a must to enjoy the tightness of that same sweater. The same can be said for a good crotchrope to go with her tight jeans. Her blue lipstick is a nice character trait for her, so it's best to give her a gag that keeps them visible. So long as she's having fun, she won't mind the situation at all during the entire captivity.