ok but keith has a pony tail.
All I know is that LM and JDS have mentioned in past interviews that they were hug fans of Macross/Robotech and were heavy influenced by them. Voltron does parallel a few things from the show. I have a few posts on it if you scroll deep into my acc lol
ALSO, keep in mind: yes, it's devastating that his significant other died..but Shiro is still young. He's in his twenties and I don't think he'll grief for the rest of his life. His character is about fighting and moving on no matter the obstacle. He even said "sometimes you have to make hard choices" which is true.
Him moving on is a stepping stone.
Ofc, I don't think Shiro will ever forget Adam bc he was someone rly important to him. +ofc I still like adashi / shadam