The fantasy-Japan personification of Christmas spirit, the rabbit-eared Aru works as a typical old shopkeeper at the Rbit Hobby Store for 11 of the 12 months of the year, but come December, she mysteriously disappears. The rumors of a 'Santa' flying throughout the sky and dispensing presents for children worldwide is actually her doing, and she has to spend unhealthy amounts of time preparing each time, but she still maintains a strong sense of joy and passion while doing so. She is also as ambitious as a typical protagonist, stopping at nothing to ensure all her gifts are delivered on time, aided by her miniature reindeer assistant Rein (pronounced RYNE, as in 'rhino').

Aru is in her mid-teens. Though scared of particularly strong foes, she does her best to maintain optimism even in the face of hardship, but it's still a work in progress, as she has a slight tendency to crack and get emotional under pressure. Either way, she should mostly be portrayed as a determined, upbeat girl with no intention of ever letting her goals slip from sight.

Required for this role are some vocal-sensitive responses such as wails, yelps, and groans of pain and exhaustion. Extra consideration will be given to those who are familiar with / willing to play the game, and those who can conduct their own audio editing.