Luka Urushibara/Relationships

Eisuke Urushibara
His father that he loves very much, who he even tries to "protect" from Kurisu's ostensible advances. At the same time as he loves him he is also troubled by his "strange" tendencies, such as when Eisuke encourages him to act more girly and wear female clothing. Luka once mentioned becoming fed up with him due to this.