No offical system name but, the sillies. Our little tea party. Collectively known as Zero, any pronouns work for us but we would like if you asked us as well :)
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Most Commonly Seen

Ken
・He/She
・same age as body
・trans boy, aroace bi lesbian
・Host/Main. You'll interact with him the most.
・The OG Zero.
・changes name all the time lol

Noelle
・Any pronouns, predominantly she/her
・demigirl, lesbian
・19-21 yrs old
・Caretaker, Co-Host
・half deer half girl

Other guys u might meet

Mike
・He/It
・15 yrs old
・male, bisexual
・Role unknown as of right now, possibly perpetrator, we don't know
・Unintentionally an asshole, well at least to friends of ours

Juliet
・She/They
・Age unknown (by Noelle)
・sexuality, gender unknown
・role unknown
・hasn't been seen lately, runs vent account 'shutthefuckupjuliet'

Less active/possible members

KC/Nana:
・She/Her
・doesn't know her age
・doesn't know gender or sexuality
・Fictive (Kawaii~Chan)
・she was completely inactive for year's but is back now. Doesn't know anything about herself as you can tell but is very excited to meet our friends.
・yes, she does have cat ears and a tail (non-human)

Nameless Man
・He/Him
・Unspecified adult (eldest sans the goddess)
・I assume some sort of protector or trauma holder or gatekeeper
・nonverbal, or just refuses to talk
・Does not front, but is always there
・ intimidating but actually very friendly

Zelda: She/He. About like, 25 yrs old. I don't know what else to add
Zenitsu: Fictive, obvi. He/They, hasn't been around.
Unnamed Goddess: They/Them, REALLY FUCKING TALL AND GLOWY. Non-human, age in the thousands. They're physically present in headspace, not fond of humans that aren't in system.
There r other members, some names feel familiar to us but these are ones that have fronted or interacted with me (Noelle) or Robin. Sorry we don't know much. We're still learning.