Using Fire for Mundane Tasks.

Dia obtained the element for fire. 
Though she was disappointed she didn't get sky, she knows deep down that it was always meant to be fire. 
Getting use to the element quickly she uses it for mundane tasks. Like heating up her tea, or lighting a cigarette.
Dia's fire is often recognizable for it's blue/purple hue. 
When Dia's emotions become something she can't control, her fire will start to burn her. However, outside of that it does not hurt to use.