Kiraku Yasuyuki (Son)
Midoriyama (OB presumably)
Midoriyama's Head Coach
Professional Tennis Player
Kiraku Taizo is Yasuyuki Kiraru's Father.
It is just known that Yasuyuki Kiraru's father was Kiraku Taizo.
A former pro who won four consecutive championships in Japan, he is now the Special Head Coach of Midoriyama. He is an old friend of Nanjiro Echizen and considers Nanjiro the senpai. He forced his son, Yasuyuki, into playing tennis, which he starts to question himself whether it was the right thing to do.
He has black hair and a similar face with Yasuyuki.