This is one of the main characters of the series and has a supporting role in episode 1.

Shirase Kobuchizawa is a third-year high school student who dedicated her youth to saving money to go to Antarctica and find out what happened to her missing mother. When Shirase was in middle school, her mother went on an expedition to Antarctica, but disappeared and was never found. Shirase, at first seeming well put together, is actually prone to reacting extremely to many situations and gets very emotional. It's assumed that she has no friends, but after losing all the money she had saved up, it is Mari who finds and returns it to Shirase, who invites Mari to come to Antarctica with her in episode 1. Shirase has a bipolar personality, being someone who at one moment will be shy and awkward, but will be loud and rowdy the next moment.

I prefer a voice that is similar to the character's in the sub: Serious, awkward, aloof