Lash

Andrew Garner is a S.H.I.E.L.D. psychologist, Melinda May's ex-husband, exposed to Terrigen and transformed into Lash, a monstrous Inhuman compelled to hunt down others of his own kind he judges unworthy. He sacrifices himself to break Hive's mind control over Daisy Johnson.

First turns up in Agents of S.H.I.E.L.D. (Season 3).