Kouta Hasegawa is one of the five main characters from the anime Sanrio Danshi. He is also one of the characters whose route you can play in Cybird's Sanrio Danshi game. He is a high school student. His favorite fanatic character is Pompompurin. Kouta was heavily influenced by his grandmother at a young age. 

As a child, Kouta was greatly motivated by his grandma, who had gifted him the Pompompurin doll for his birthday. He had lived a relatively happy life with his grandmother and the doll until he started getting taunted and made fun of for liking "girly" things. His grandma tried to comfort him, but the bullying proved too much and he yelled at her for giving him the doll in the first place, keeping his distance afterward. He wanted to apologize for a long time, but by the time he had worked up the courage, it was too late. His grandmother passed before he got the chance.

It wasn't until he had found the doll in a box during high school that he started to get into Sanrio, and started to make friends with the other four main cast of the anime. At first, he was hesitant to admit he liked the girly characters, but with the help of his friends, he became a bit more relaxed about it and began to openly accept his interest, despite still being embarrassed when someone brought it up.