Shortly before Yui’s death, Yui sealed a part of her soul in the right eye of Taiga Rinku. This resulted in a unique dojutsu that only Taiga Rinku can use under special conditions. The condition is that Taiga and Yui's souls must act as one, which means Taiga and Yui must want the same thing and must be willing to let the other control the body. This dojutsu gives Taiga mysterious techniques. Even when the powers aren't active, Taiga can talk to Yui. This is shown when he is seemingly talking to himself.