When Kae was exiled, she was welcomed by Revan to join the Revanchists and fought the Mandalorians alongside him until the Battle of Malachor V.
The child's father was Senator and General Yusanis of Echani, a famed and powerful warrior. On her account, Kae was exiled when her infractions came to light. According to Kreia, Master Kae had managed to keep a secret love affair, and a child for almost a decade, in violation of one of the Order's rules of that time which stated Jedi should not have children. Kae's exile from the Order was mentioned to Meetra by both Mical and Kreia, the latter providing further details on the reasons for her sentence. Zez-Kai Ell also mentioned Kae as he spoke of the failures of the Jedi Masters of the past, because of Revan's fall to the dark side of the Force.
The Jedi scholar would mention to Meetra Surik in 3951 BBY that she was among the Masters blamed for the Jedi schism during the Mandalorian Wars, and for the Civil War that followed. ' There have been so many failures, by teachers who believed in the Code with all their being – Master Arca failed Ulic, as Master Baas failed Exar Kun, as Kae and Zhar and the others of the Council failed Revan.' ―Zez-Kai Ell Īccording to Mical, Arren Kae was one of the Masters that Revan held during his time as a Padawan.