Sinistra

Sinistra is one of the main villains in the Warriors of Chronos franchise. She is a witch who lives in the Dark Mountains known to frequently ally with Shang-Tsei, despite their alliances often ends with fighting and betrayal. Sinistra isn't straightly villainous, her goals aren't strictly evil but she is ready to do evil to get to her goals, and her selfishness makes her untrustworthy and disloyal.

Development
Sinistra was created by Zaid Campbell to be the opposite of Merlin: Shang-Tsei was the main villain of the franchise and the nemesis of Prince Marcus, but like Marcus had Merlin as a mentor, Campbell wanted Shang-Tsei to have a similar ally. On the matter, Zaid explained:"'You see, Merlin's thing is that he shares his knowledge with others, while Sinistra is all about learning more and more without sharing anything to anyone [...] Then, Merlin and Marcus' relation is based on trust and honor [...] while Shang-Tsei and Sinistra constantly betray each other.'"With a similar idea, Sinistra was given Luna as a pupil to reflect Johnny and Merlin.

History
Sinistra is an immortal witch who lives as an hermit in the Dark Mountains; for as long as Chronos remembers, Sinistra was always there, keeping away anyone who dared walk on the Dark Mountains. Her motives aren't evil, all she wishes to be kept alone; contrarily to Shang-Tsei, Sinistra doesn't seek power or control, she keeps to her own quest for knowledge and magic. But of course, to get her hand on magical artifacts she's ready to steal, kill and even wash out entire civilizations much like she did with the Wolf Tribes..

Sinistra have always been a menacing presence to Chronos; she always desired certain items all of her life, but for most of her life she was unable to: even her powerful magical powers were no match to the strength of Camelot's armies.

Before the events of the first episode of the TV series, Shang-Tsei cornered the Dark Mountains and threatened Sinistra to lock her away if she wouldn't cooperate. The two villains worked out a deal, that Sinistra wouldn't bother or attack Shang-Tsei or his armies, and Sinistra would be able to use Shang-Tsei's armies for her own personal needs. This deal became the main threat in Chronos and throughout the series, with Shang-Tsei's armies and Sinistra's powers, Chronos needed heroes, and this is was drove Merlin to unite the Warriors of Chronos.

Unlike other allies of Shang-Tsei, Sinistra was disloyal: with most of their plans ending with betrayal, the two most powerful villains of Chronos couldn't trust each other with anything, both of them indifferent to leaving the other behind if it meant getting out of trouble. Sinistra would also, when times showed to be critical, allied with the Warriors of Chronos to fight off great threat: Sinistra would only help anyone, good or bad, if it would benefited her in the end.

In "The Fall of the Wizard" story arc, Sinistra sends Kryll to steal the Hyperstone at the Camelot Castle, but during his mission, he is surprised by Merlin and, in the moment, he throws a powerful spell at Merlin which kills him. King Arthur ultimately spares Kryll and blames instead Sinistra, but Sinistra is never confronted or punished for the death of Merlin in the series.