I have made a character for a Qiu and Tamarack Poly route (I have other characters for different routes too, but they're still in the works)
(The edit is because I forgot the accent mark on the 'u')
This is Shù Herbst! (Step 1 specifically)
She's of German and Chinese decent (70-75% German and 20-25% Chinese). They're intersex and go by any pronouns without any preference, and they used to live far away from Golden Grove.
In this scenario/timeline, Opal is 50% German and 50% Chinese and had her mother (Shu's Grandma) name Shu.
(The donor is mostly/all German and that possible 10-1% is something unknown)
Before living in Golden Grove, Shù was always a nervous child. It didn't help that the other children picked on him for her strange hair and eye color. Although the other children didn't mean to take it so far, an accident happened where Shù had gotten hurt around their neck (I'm not sure what the accident is yet).
This led to the scar on their neck, and he's very insecure about it so she wears scarves or anything that can cover it up. The accident also led to them being unable to speak due to physical (and a little bit of mental) trauma.
I like to think that she's going through a therapy between the moments, so I believe that around the beginning of Step 2, he can form small sentences but it still hurts a bit. Oh-! And he wears glasses in step 2-3.
She's deferring, unassuming, and admiring for both Qiu and Tamarack.
His name: Shù (树), I believe is 'tree' in Chinese and Herbst is the German word for 'Autumn'.
(Sorry if some of these things aren't accurate or if they seem kinda weird(?), I'm still fiddling with their backstory and the other ones I'm making)