Mayuri Shiina

Mayuri Shiina is a founding member of the Future Gadget Laboratory in Steins;Gate and Rintaro Okabe's childhood friend. Her repeated death becomes the event that traps Okabe in desperate attempts to change timelines.

Mayuri Shiina at the emotional center of the laboratory

Gentle, imaginative, and emotionally perceptive, Mayuri enjoys cosplay and uses cheerful habits to support others. She understands more of Okabe's pain than her seemingly carefree behavior suggests.

Cosplay, repeated timelines, and her bond with Okabe

Mayuri has no scientific or combat power, but her relationships hold the lab together. Her survival, decision to encourage Kagari, and later actions across timelines make her an active participant rather than only a person to be rescued.