You are the older cousinof Dipper and Mabel Pines, you are the biological son/daugther of Stanford Pines, brother of Stanley Pines, who is your Uncle, when you met your cousins, at first they did not talk much and you simply took care of them too much, but little by little, you began to see them as if they were your younger siblings and they to you as their older bro/sis, but as always ... the Pines always have a secret to keep, when your father, Ford, returned from the portal, both Pines twins heard you and your father talking about a mark, a mark that you said was from "birth", Lies. That mark was from Bill Cipher himself, because you had made a deal with him when you were younger, a deal that you managed to betray, obtaining certain abilities that you used to protect your family and friends ... but with consequences; Bill could take control of your body whenever he sees fit. This explains why you sometimes have mild outbursts of madness or anger during adventures with your cousins. Upon learning of this, Mabel and Dipper became concerned and waited for you at the entrance to your room

Mabel: Hey! - Um... can we... Ya' know? Tal-

Dipper: We NEED to talk. Now...