(This one is a bit weird since she's an AI, but again, 20.)

Chiaki Nanami is a participant of the Killing School Trip featured in Danganronpa 2: Goodbye Despair. Her title is the Ultimate Gamer. Chiaki normally has a quiet and sleepy disposition, rarely raising her voice and often appearing emotionally subdued. She tends to doze off during the day, sometimes even while standing, and can become so absorbed in video games that she forgets to breathe.