Arren Kae

"She was a Jedi Knight&mdash;a master, named Arren Kae."

- Kreia

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
"...she was... said to be... a skilled warrior. Beautiful. And strong in the Force."

- Kreia

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 had a child (one of the Order's rules which states Jedi should not love).

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.

There is nothing to state what exactly happened to Arren, only that she was killed during the Mandalorian War at Malachor V. The same holds true for Yusanis, only that he met Darth Revan in battle and was defeated.

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

Evidence put forward by supporters of this theory includes:
 * The fact that both Kae and Kreia are referenced as being Revan's first master
 * Atris's exclamation of "Kreia? That is not her name"
 * The odd, almost coy, way in which Kreia speaks of her
 * The fact that the Jedi Exile has no knowledge of her at all, despite her being a prominent Jedi Knight/Master who fought in the Mandalorian Wars, hints that Kreia might also be causing her to forget as she is the other Jedi Masters she comes across
 * Kreia's name is pronounced as if it were a portmanteau of the names "Kae" and "Traya." This is possibly in keeping with the character's personality. Given that she turned her back on both the Jedi Council and the Sith; and combining her name as a Jedi (Kae) with her name as a Sith (Traya), instead embracing the Grey Philosophy.
 * Also, as a female Exile, there are cutscenes between the Disciple and Kreia where she plays with his mind, and makes him forget he ever knew her.

There are notable arguments against assuming that both women are the same person, however:
 * Kae is said to be exiled because of the birth of her child, and Kreia to be exiled for Revan's fall.
 * When Atris says "Kreia? That is not her name," it may not mean her name is Arren Kae, but that her name is Darth Traya.

Even so, the information on the reasons for Kae and her own exile come directly from Kreia herself, and it is interesting to note a point in the game where Master Kavar (on Dantooine, near the end of the game) says: "I thought you died during the Mandalorian Wars," which would mean that Kreia could not have been exiled for Revan's "fall," since this occured after the Mandalorian Wars.