In Guardians of the Galaxy Vol. (2017), Ego can be seen kissing a woman of Mantis' kind.
Actress Jennifer.Sharp said she played Mantis' mom and filmed a scene with Kurt Russell that was later cut, meaning Mantis and Quill are likely siblings.
Humans in 2020:
"The worst year to date."
Dogs in 2020:
I can't believe my humans have chosen to stay with me, rather than going to work.
We snuggle, go for walks & get extra treats.
THIS IS THE BEST YEAR EVER!"