Arren Kae

Arren Kae was a female Jedi Master before the Mandalorian Wars. She was one of the many masters to train Revan, and she later followed him to war against the Mandalorians.

Biography
There is some debate on the exact position that Arren Kae took within the Jedi Order. Some sources point her as a Jedi Knight, others have her as a Jedi Master. According to Mical and Kreia, Arren Kae was a Jedi Master - one of many that Revan held during his time within the Order - and she was exiled when it was discovered that she was with child.

The father was none other than the famed leader of the Echani warriors, Yusanis. When Revan came to her about fighting along side him against the Mandalorians, Arren agreed and Yusanis then followed her to war. Their child would later be known as Brianna, the last of the Handmaidens - those Echani that catered to the Jedi Master Atris - and she would join the Jedi Exile on his quest.

There is nothing to state what exactly happened to Arren, only that she was killed during the Mandalorian War. The same is true about Yusanis, only that he met Darth Revan in battle and lost.

Appearances

 * Star Wars: Knights of the Old Republic II: The Sith Lords (only mentioned in dialogs)

Behind the Scenes
There is some debate whether Kae is Kreia. They do indeed have something in common - they were both female Jedi, both taught Revan, and both were exiled from the Order.

Evidence put forward by supporters of this theory include the fact that both Kae and Kreia are referenced as being Revan's first master and Atris' exclaimation "Kreia? That is not her name".

However, Kae is said to be exiled becuase of the birth of her child, and Kreia to be exiled for Revan's fall.

And as for Atris saying "Kreia? That is not her name." may not mean her name is Arren Kae, but that her name is Darth Trayus.

So, the consensus is that they are not the same person.