A survivor of the Hyakuya orphanage and one of the seraph of the end. Krul takes him into Sanguinem in 2012 to raise as livestock. At some point, Mika approaches Ferid. Ferid gives him money and good food as payment for biting Mika and drinking his blood directly. However, Mika's goal is actually to steal a map and escape Sanguinem. Ferid feigns ignorance and waits for Mika at the exit. When the orphans try to escape, he slaughters all of them except for Yuichiro and Mika. Mika charges at Ferid to give Yu a chance to escape, and Ferid fatally wounds him. Afterward, Krul Tepes turns him into a vampire. Since she lets Mika drink her blood instead of human blood, Mika continues to age. Ferid is concerned that Mika may grow beyond the age he considers to be most beautiful.Ferid teaches Mika how greedy and wicked humans are, and Mika even witnesses the humans turn Yu into a mindless monster on the battlefield. Ferid often prefers to be close to Mika and establishes physical contact with him at every opportunity, but Mika usually tells him to shut up or moves away from him.
After becoming a vampire, Mika lives only to rescue Yu. He is known as Krul's favorite pet. Although Krul claims to be his own, Ferid considers Mika to be his favorite servant. Mika currently works as a city guard with Lacus Welt and René Simm.