Funai Yoshiyuki is a nurturing and protective young man, humble and modest. He often puts others before himself and enjoys maintaining a positive attitude to uplift those around him. Despite appearing confident, he struggles with self-doubt and insecurity. Funai is fiercely loyal to those close to him and to his master. Lastly, he strives for self-improvement and aims to be a good example to others.

Funai Yoshiyuki is to have a medium-pitched to low-pitched voice. It should be deep and full, but not threatening.