![](https://cdn.animecharacters.io/images/characters/large/150068-22951ab3.jpg)
Sousuke Amano (天野 宗助)
Erika Amano's adoptive and Nagi Umino's biological older brother by 5 years. Not much is known about him aside that he had 'disappeared' some time before the events of the arranged marriage had taken place. (Source: A Couple of Cuckoos Wiki)