Not an update, but I got an idea to rate all the pet names I've heard characters call Shu. So here goes nothing!

Snowflake

10/10

Not too cliche, but really suits him.

It's super cute.

Princess

9.9/10

Gives me butterflies!

So sweet and lovely and suiting.

Only downside is that it's too cliche.

(My princess gets extra points tho!)

Apple pie

0/10

Nice try but no, just no.

Albino

-99999999999999999999999/10

Idk, it never sat well with me.

It's not really how I perceive him.

Pretty boy

10/10

True. Soooo true.

Suits him and it's simple.

Rose/flower/flora or fauna reference

2/10

It's cute, but too unoriginal and isn't that exciting for me.

These are just my opinions! I think this is all I've heard, feel free to share whatever you guys have heard!