Divinity = divine.
There is a large difference between Divine and Demonic.
Hell, or anything related, is considered and evil force - unless of course you're basing it off of religion, in which case only
God has control of such forces.
However. Your a holy, heavenly creature (as celestial literally means the invisible heaven, or the sky / visible heaven. Because of this you say that your character is able to move fast, which implies that all characters of a holy type move quickly, which is wrong. Not the point. You created a hellfire attack (evil) when your very being suggests holy...
It may just be my overly critical thinking... but something has me feeling that your character is suspect...
I have a thing for fantasy at least being somewhat realistic. (I.E: I'm an angel! I attack with hellfire!)