Shades of element (Black Clover x OC) (soulmateau)

Seline Enoteca is a witch, she escaped with her sister from the witches' forest. She has a huge amount of mana equal to that of a captain and her grimoire is divided into sections, one for each element (fire, water, air, earth, light, dark). This is why she is so powerful. She joins the black bull because Yami was the one who saved her and her sister.

In this world, soulmates exist and are recognized through grimoires. At 16, a page appears in which the names of one's soul mates are written.

Hi, English is not my first language, so if there are grammatical errors I ask you to forgive me, i follow the plot so there might be some spoilers, and the characters do not belong to me, except Seline.
With this I wish you a good read.