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Regarding Tyris – she shouldn't have magic; she should just have a fire attack (Psatha is aware of this). She doesn't need a magical special ability.
Unless it's possible to do something like this:
At the beginning of each battle, a portion of the enemy warriors will be destroyed by fire. The higher the level, the more will burn.
Something along those lines.
The name could be changed to Orjin, although I would keep Tyris.