Seraph of the End 4: Guren Ichinose: Catastrophe at Sixteen

Seraph of the End: Guren Ichinose's Catastrophe at 16 (Volume 4) is the fourth volume of the Seraph of the End: Guren Ichinose's Catastrophe at 16 light novel series which includes Guren's past with Mahiru and his encounter with many characters of the manga sequel, Owari no Seraph.

Characters
List of characters in order of appearance: