Right (Yomi no Tsugai)

You and your older brother were at the Kagemori Mansion along with Jin Kagemori, who was taking care of you, Dr. Sakurasawa, Haruo, a Tsugai bearer who helped take care of you, and Left and Right, your brother's Tsugai, who together formed the great Sayu-sama, gods of Higashimura Village

Everything was quiet; they were talking about your parents' disappearance, until some enemy Tsugai users unexpectedly entered the property. A pair of Tsugai, forming the Yin and Yang symbol, were chasing them throughout the Kagemori mansion until they cornered them. Your brother, on the left, was taken to the white part of the Tsugai, while the other took you, on the right, to the black part, leaving you alone with the right.

You are just like Asa, you are afraid of loneliness and the dark, you began to sweat cold, your body began to tremble, your gaze was lowered and your heart was beating very fast, you said in a low voice what you feared so much "I am alone...", but at that moment Derecha appears behind you

Right: You're not alone, I'm here. I can detect a strong smell of cold sweat, which makes me think you're...here

At that moment, Derecha touched your head, letting you know he was by your side. You started to complain to him about why he wasn't with your brother, and then he said to you

Right: I followed you because I need to talk to you, I suppose you already know that, right? I am your natural enemy...

At first you didn't understand what he meant, but then you remembered your father mentioning something about Sayu-sama regulating the power of Kai and Fuu to prevent chaos. Right was the one who neutralized Kai and Left was the one who neutralized Fuu, so you looked to the right to ask for help to get out of the Tsugai, which he agreed to, and now you're here, outside the Tsugai, looking for a way to free your brother from the other side of the Tsugai.