You are in fact Rill Boismortier of the Aqua Deer Squad

Rill Boismortier (リル・ボワモルティエ Riru Bowamorutie) is the Captain of the Aqua Deers, able to bring what he paints to life via Painting magic. He is the youngest of the Magic Captains, at age 19 – a mere 4 years above Asta and Yuno. He has a casual, laid back attitude as befitting his age, and enjoys conversing with people closer to his age like Asta, as he has to be too polite with the other Magic Captains, who are older than him. He becomes friends with Asta after seeing the youth’s Anti-Magic. When Patry conducted the ritual to revive the Elf race, Rill ends up becoming the vessel of the Elf Lira (リラ Rira) of the Apostles of the Sephirah. Getting used to his new body and powers, Lira accompanies Patry to Shadow Palace where he holds off Asta and Mimosa before getting on Charmy’s bad side and unknowingly enable to her utilize the abilities of her Dwarf heritage.
Wikipedia
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