- "I-I'm sorry, sir."
- — Akio's common catchphrase.
Akio Fukai, also known as Akio Yamaguchi (深井/山口 昭夫, Fukai/Yamaguchi Akio) is a main character in Shiro to Fukai - White and Obnoxious. He's the busy, timid and scatterbrained husband of Karen Fukai and the father of Runa Fukai, who usually frowns upon his wife's obnoxious, bossy and entitled behavior towards others. Karen usually gives orders to Akio which he has to do, only because he fears her. He is based off of the "Henpecked Husband" stereotype.
Akio is voiced by Tatsuya Tokutake in the Japanese version while Griffin Burns voices him in the English dub.