Komachiya Nazuna

Magia: Flame Tact (Tact=Takstock is a word for a musical baton, rather than the standard English meaning) This magia allows the summoning and control of heat accompanied by an illusionary flame.
Nazuna is the protagonist's younger sister and now his senpai due to his time in a coma. This has left her with complex feelings that she has trouble dealing with (that mostly display themselves as tsundere behavior)