Curate, connect, and discover
Miscellaneous (non-Starbula) Post-Vol. 3 Headcanons
The Sovereign are so averse to making contact with "lesser beings" that they don't make physical greetings or signs of affection like hugs, handshakes, fist bumps, high fives, etc. Adam has been gradually learning these gestures since moving to Knowhere.
Phyla calls Nebula Mommy/Mama, Quill is Dad and Drax is Papa. All the other adults are Uncles or Aunts, except Rocket (he's Captain).
High Evolutionary considers most of Quill's playlist "not real music", so Rocket makes sure his prison cell is placed near one of the biggest speakers to annoy him whenever they play it.
Adam thinks Star-Lord is actual nobility, and he addresses Quill as Your Lordship.
Kraglin and Cosmo have built a specially made pen for Mantis' Abilisks on Knowhere, so they can stay there when/if she comes home.
Once they have all the buildings repaired (and any other new buildings/facilities they're planning to set up) Nebula wants to go looking around the other planets for more plant life to put on Knowhere so they can make it look nicer and greener. Groot will be her main consultant for picking the best ones.
When Rocket's new Guardians go on their missions, Phyla always likes to take souvenirs from the planets she goes to and bring them back to Knowhere to show Nebula. It's usually just mundane trinkets or even bits of rock or rubble, but she treats every one she collects like a beautiful treasure.
Adam, Phyla and the other rescued experiments don't know or remember when they were born and have no birth records. So they all share a "birthday" on the anniversary of the day they came to Knowhere and became part of the Guardians family.
Nebula's favourite music groups are Generation X and U2, but she hasn't told anyone this.
When Quill eventually comes back to Knowhere, he'll have caught up on all the trends, songs and pop culture changes that happened during his time in space and want to share them with everyone else. Most of them still prefer his 70's/80's stuff, though.