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Myson appears in the Azure Moon route. Despite their leader's death at the hands of Kingdom forces, Myson and several agents of those who slither in the dark remained under Edelgard's service, although due to their conflicting beliefs they were only there to assist her in taking out their common enemy.
Prior to the battle, Ingrid notices that several of the Imperial mages weren't wearing their typical uniforms. If Myson is killed, the remaining agents will retreat from the palace, unwilling to sacrifice their goal attempting to defend Edelgard.
He also appears in chapter 21 of the Verdant Wind route, along with others of Those Who Slither In The Dark.
|Magic||Combat Arts||Abilities||Starting Items|
Black Magic Uses x2
Reason Lv 5
Dark Magic Range +1
—Myson's pre-battle quote
—Myson's pre-battle quote against Byleth
—Myson's death quote