Replying...
Intro. Merlin「マーリン」 is the Boar's Sin of Gluttony「暴食の罪ボア・シン, Boa Shin」 of the Seven Deadly Sins. She is regarded as the greatest sorcerer in Britannia. Her Sacred Treasure is the Morning Star Aldan, a floating orb she can summon at will and often uses in conjunction with her spells and her inherent power Infinity. The name "Merlin" is actually an alias as her true name is unpronounceable to humans. After the Holy War and archieving her goal of turning Arthur Pendragon into the "King of Chaos", Merlin officially parted ways with the rest of the Seven Deadly Sins in order to help Arthur rebuild the Kingdom of Camelot using his new power.

Merlin

@Alex Mercer