Mantis is probably Liquid’s best friend.
During their years in FOXHOUND together, Liquid respected Mantis and really appreciated him for his presence on the team. He was really glad he’d been able to convince Mantis to join, and the man’s psychic powers inspired almost childlike awe in him. He took care of him like he took care of the rest of his team.
Now, though, remembering how he neglected them during Shadow Moses, and knowing THIS Mantis, spending time with him and learning more about him than he ever did before…it’s changed something.
He considers Mantis more then just a colleague, he considers him his best friend and practically family. FOXHOUND’s been through so much together, and that plus his experiences here on Tumblr have made him closer to his team - or what’s left of them.
In short he really cares about Mantis and bla bla feels.