Board Thread:Speculation House/@comment-10380701-20141011082048/@comment-10380701-20141012230914

From observation, activating her semblance generally means her eyes go red. She also uses it for intimidation purposes, as seen in Chapter 6 when she got salty that Blake is being a stubborn kitty.

The fire she emanates tends to vary as well. It went from a short burst of flames in The Emerald Forest, an explosion in Players an Pieces (another usage of her semblance for intimidation), to a crackling of fire in Burning the Candle... to a fiery explosion of doom in the end of the Yellow Trailer.

Her hair glows whenever she has enough energy to pull out a powerful move, seen prominently during the Yellow Trailer, where it starts to glow when she's about to finish off Melanie, and when Junior hits her a couple of times.

In layman's terms, she has at least 50% ultra meter when her hair is glowing.