The Eminence in Shadow, Vol. 16 (manga)

Fenrir, fifth seat of the Knights of Rounds, has placed Cid’s classmates in jeopardy once more in a bid to break the seal on the right arm of Diablos. As the clock ticks down toward a bloody end, the villain’s plot is opposed by…a total nobody named Suzuki? Whoever this guy is, he sure knows how to drop mysterious one-liners!