Piruluk, also known as Allos Piruluk, is the LRIG partner of Kiyoi Mizushima in Lostorage incited WIXOSS. She is a girl with blue hair tied in a right-sided ponytail, and her appearance closely resembles Amika Hashimoto, the last Selector who partnered with Kiyoi when Kiyoi herself existed as an LRIG; Amika in turn resembled Kiyoi's deceased friend Ayumi Sakaguchi. This version of Piruluk is distinct from the Piruluk seen in the earlier WIXOSS series. She is a new LRIG created from Kiyoi's memories of her own time as an LRIG, which is why she shares many of the same abilities that Kiyoi once had in that form.

In terms of personality, Piruluk initially comes across as cold, quiet, and reserved, reflecting traits that Kiyoi herself displayed. She rarely speaks and keeps her thoughts to herself, especially during battle. Despite this detached demeanor, she is deeply loyal to Kiyoi and is willing to deliberately take damage or even lose battles on purpose if it benefits Kiyoi in the long run, revealing that her cool exterior masks a strong commitment to her Selector's wellbeing.

Her central motivation is supporting Kiyoi as she re-enters the dangerous world of Selector Battles. Piruluk acts as more than a combat partner; she also functions as a guide, reminding Kiyoi how to use her coins to activate her Peeping ability, a power that operates in a manner similar to the Peeping Analyze ability Kiyoi possessed during her own time as an LRIG. This ability lets her gather insight about opponents and the flow of battle, giving Kiyoi a meaningful strategic advantage.

Within the story, Piruluk holds a supporting role in Kiyoi's efforts to navigate the new Selector system and reclaim the memories tied to her past. The bond between the two is central to her character, since Piruluk was shaped from Kiyoi's memories and therefore carries echoes of Kiyoi's earlier experiences, helping Kiyoi reconnect with the person she once was. Piruluk continues to appear alongside Kiyoi in the follow-up series Lostorage Conflated WIXOSS, where Kiyoi takes part in a third Selector system with Allos Piruluk as her main LRIG.

In terms of development, Piruluk gradually shows that her quiet nature contains a resolute will to protect Kiyoi at any cost. Her willingness to accept damage or defeat intentionally when it serves Kiyoi's goals marks a shift from a seemingly passive LRIG into an active protector. Her notable abilities are tied to this supporting role, including the coin-fueled Peeping power inherited from Kiyoi's LRIG days and the combat skills expected of an LRIG in Selector Battles, both made more effective by her tactical awareness and readiness to sacrifice herself for her partner.