Tanpei

The loyal lab assistant of Dr. Kieda, a smart and sporty boy at the age of 13. He is warm, pure, and courageous, also he is a genius at mechanics. He is often seen sparring with Junko, his fellow assistant and Dr Kieda's granddaughter, comforting and encouraging her, and has been depicted as having a crush on her for more than once. Everybody in the team calls him "Tanpei-chan". Not much of his family and school background is given. Source: Wiki