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Asteri
The character on the home page and at the support desk.
Asteri only shows up on bigger screens, like a computer, so these don't do anything here. They'll apply when you visit on one.
On the site
Sound
Music
The soundtrack that plays as the home page drops into deep space.
Badges
Earned by messing about with Asteri: on the home page, the other pages, and at the support desk. Seasonal ones can only be had while the site is dressed for that time of year.