Nagi is a confident boy who is popular with the girls his age, and seems to be a bit of a playboy. His maturity and knowledge concerning girls belies his age, convincing even Hodaka to refer to him as "senpai." He possesses a caring side and a sense of self-awareness evidenced by his desire to see his sister experience a normal teenager's life, as she does a lot for him.
He was born in 2011.
Nagi is an elementary school student who Hodaka witnessed smooth talking girls on the bus. They were properly introduced by Hina when Hodaka discovered he was Hina's younger brother. He did what he could to help his sister in her Sunshine Girl ventures, and was supportive of Hodaka's feelings towards her.
Behind the Scenes
He is voiced by Sakura Kiryu.
Amano (天野) means "sky field", while Nagi (凪) means "calm" (weather).