Whaaa I don't know about this but it's Lamiah vs Iosefine. Fanart of a roleplay.
Two friends against each other. Basically, Lamiah went to ditch the group. However, Iosefine came and prevented her from proceeding through the stone path.

This is how it went :

Iosefine : " Lamiah! Stop right there! "

Lamiah : " No one stops me. Even you. "

Iosefine : " You've done enough. You broke the code! "

Lamiah : " You're all eternally blind. I'm finding my own way to find true loyalty! "

Iosefine : " So be it, Lamiah. After all you served as the first... prepare to face your punishment for breaking the code, erasure! I'm going to take YOU down! "

*Iosefine ordered her Gallene(the violet fireball) to attack*