This individual is a newcomer to this institution, possessing exceptional abilities. Despite appearing reserved and unassuming, he may give off an unfavorable vibe to those around him. This student frequently absents himself from classes. It seems that his unique talent remains concealed from others.
The reason why keeps his journal is because his weakness is that he only remembers the last 2 years he lived through, meaning he loses his memories of anything older than the last 2 years.
His talent is being immortal. He quickly suspects Nana to be the one responsible of the others students disappearance.