Commander Shadowsun is a leader of the Tau Fire Warriors.
Official Canon Edit
TTS Canon Edit
The Emperor claimed to have found a recording revealing the true reason why Kitten hated the Tau; it was because Shadowsun broke up with him to fight for the Greater Good, and because every time she was near him it made her forhead sore.
Kitten vehemently denied ever dating Shadowsun, delcaring "THIS IS NOT FUCKING CANON!" Despite this, he was also taunted by Magnus claiming that they were dating.