Dimitri Saitou

Being half Russian and looking like a foreigner, most people assume that Mitya is a foreigner and doesn't know Japanese. Due to past trauma and abandonment issues, he distrusts people and only allows Asahiko to get close to him. [Spoiler] His father had several affairs, and later on Mitya discovers that he has an older half-brother (Ivan) and a younger half-brother (Alyosha). [/Spoiler]