Semi usually appears serious and stoic, though he is actually hot headed and competitive. He cares a lot about his volleyball teammates and friends and acknowledges their strenght and abilities. That's the same for his opponents. He is occasionally sincere and nice though he can also show annoyance, for example when someone calls him by the nickname Semi-Semi. Semi is often seen with a small scowl/frown on his face. Semi has thick and messy ash blonde hair with dark grey tips.