Len is a cheerful and enthusiastic boy who loves bananas and his twin sister Rin. Often sarcastic, fond of teasing those he loves, he only half-heartedly admits how he really feels about his loved ones. He is a childlike, energetic, affectionate, concerned person who always gives his all. He is an excellent singer and musician, committed and affectionate. He finds it difficult to talk about how he feels, lives and tends to minimize his suffering.