Crematia is the angel of fire and pain, but most of all she is the angel of magic. It does not come at any surprise to her that there are spell casters here, and that their magic possibly works differently than hers. Perhaps different incantations or maybe none at all. She is beyond curious on how magic works here and Sirius here does not disappoint her in his potential.

Shame that he is such a weakling.

She hears him speaking a strange word - clearly a spell - and knew she has a second, maybe less, to react.

A hushed prayer and she is gone.

Or is she? She appears behind the drunkard, but this time she caste herself the spell of haste, quickening her steps should she need her speed more than her magic.