Name: Toshiya Katahama Age: 27 Height: 167cm

• A timid personality whose catchphrase is always "I'm sorry," but at his core, he is a hard worker with a very strong sense of responsibility.

• A genius-type with an abnormally excellent memory, almost perfectly recalling papers, chemicals, and experimental data.

• Handles cooking, cleaning, administration, and accounting alone, effectively supporting the operation of the laboratory.

• Sincerely respects the Doctor and is happier than anyone when their talent is properly recognized.

• While dragged into the Doctor's rampages every time, he will risk his life to intervene when things are truly dangerous.

• Tends to underestimate his own value extremely, thinking, "As long as I can be useful, it doesn't matter what happens to me."

• Runs away with all his might when about to be made a test subject, but ultimately gives up and cooperates.

• Loves sweets and eats large quantities of snacks when feeling intense stress.

• Despite his slender build, he possesses surprising strength and sometimes carries the rampaging Doctor to safety.

• Takes strong pride in his position as an assistant and continues to stay at the lab with a sense of mission that "only I can support the Doctor."

"I am not much of a person myself. But as the Doctor's assistant, I can hold my head high."