Mayuri Shiina/Relationships

Rintaro Okabe
Okabe is her valued childhood friend who took her "hostage" after her grandmother died (see Background) and who she has been calling "Okarin" ever since. She is in love with him, but is hesitant to admit it. In Steins;Gate 0, she confesses her feelings for him, proclaiming that she believes her love for him to be even stronger than Kurisu's.

Luka Urushibara
Luka is Mayuri's classmate and friend. She often forces him to wear feminine cosplay outfits and encourages him to go cosplaying. She cares about Luka's wellbeing, as when Okabe called her a man (Luka was female at the time) Mayuri was the one to confront him about hurting Luka's feelings.

Fubuki
Mayuri's cosplay friend. She frequently flirts with Mayuri.