Sugar Rush is the alias of Nora Lunis, an original character of tumblr user terminallydraconic. Sugar Rush is currently unaligned, loyal to 'who pays the most', suggesting a life as an assasin. Sugar Rush has the power to steal energy and absorb it. The limitations of this are unknown.
It is highly dependent of which version of Sugar Rush you are defining Nora's charactistics. Normally, Sugar Rush is rather tired and prone to be anti-everything. However, when having used the power-absorbing ability, Sugar Rush lives up to the name - displaying trickster - like behavior.