Kyvan was one of the false identities adopted by Maldis -- this one specifically intended to exact revenge upon Zotoh Zhaan. Posing as a merchant in a commerce station, she was able to convince Chiana to take a painting aboard Moya. This painting was a conduit for Maldis' incredible psionic powers.
Eventually, Zhaan realized the role Kyvan played in linking Maldis to the corporeal world. Acting on this information, Aeryn Sun shot Kyvan -- destroying the guise, which shattered moments before the entire commerce station broke apart.
Kyvan is derived from Farscape.