An adventurer that lived 110 years ago, but was rescued when The Flock discovered her petrified body in The Stone Temple. She agreed to help out in their new home as a thanks for being rescued.
After Elmroot acquired the Heartwood Staff, the party tried to reach out to her, not getting a response. In a panic they returned home to find a Doppelganger in her place.
Having cornered and captured Vhalak, the party learned that her body was dumped in the river leading to the ocean, with the doppelganger telling them that she died without pain. When they retrieved her body from the mortuary the found that his claims were far from the truth, as she had been quite extensively tortured before death. Bringing the body back to The Nest, the party did a resurrection ritual with Jen, managing to barely bring her back to life.
The party offered to relocate her and Jen to the Grove of Eternal Whispers for safety, but she refused, not wanting to leave her new home. Relic helped her in removing the memories from the whole ordeal, returning her more cheery disposition.
After Malice made herself known, Arin escaped with Jen and her family to an undisclosed hidden location, taking Rod with them. After the drow attacked, Arin was wounded trying to protect Jen, causing her to fall under the effects of a poison, but the party managed to save her when they reunited after the fall of Vuthul. Jen and Arin attended the coronation of Penny, before settling down to spend the rest of their lives together.