Passage: Hinata is a bright, dependable guy who is the closest to Otonashi. He always tries to save his friends if he can and is a reliable force in the team. He and Yui constantly irritate one another on a daily basis, but deep down, he cares for Yui, as shown when he helps her pass on by telling her he would marry her. He is a talented baseball player, and his regret in life was his failure to catch a baseball, which cost his team an important baseball game. He nicknamed Yuri as Yurippe when they co-founded the SSS as he did not feel comfortable calling her Yuri, because his mother has the same name. He has shown romantic feelings towards Yuri in Track Zero, although he finds himself getting attracted to Yui much later in the series. He died from getting hit by a truck. He uses an RPK-74 and an S&W 645.

Question: Why did he give her the nickname Yurippe?
he did not feel comfortable calling her Yuri, because his mother has the same name