Best Friend Squad

Best Friend Squad is the friend ship between Adora, Bow and Glimmer from the She-Ra and the Princesses of Power fandom.

Canon
The Best Friend Squad is the name given by Bow to describe their friendship together. The group is always seen together in the show. Their relationship is rocky at first due to Glimmer not trusting Adora.

They have a lot of moments together and they seem to trust each other well. They also care about each other a lot, their very good friends and they have a LOT of screen time, other than that their relationship is great.

In Season 1 Episode 6, Bow talks about all the arrows he has made. He mentions his newest arrow, "The Sonic Arrow!" Then Glimmer and Adora laugh at him asking questions.

In Season 1 Episode 8, The Best Friend Squad is going to princess prom, Glimmer is excited to go with Bow until Bow admits he's going with Perfuma. Glimmer is sad about the news and she has to go with Adora instead.

Basically in Season 1 Episode 9, Bow and Adora are trying to save glimmer from the horde, this episode really shows how much they care about each other and would go through anything to save each other.

In one of the episodes(IT may have been season 1 episode 1 or 2), Glimer and Bow have to disguise Adora for a party, They throw on a light blue cape on her, then Bow decides to give her a flower for her hair. Then Adora says "I don't Like it." This is one of the first interactions with the best friend squad in the show.

Friendship
The group is shipped as friends because they are called the best friend squad. They have a normal and weird friendship and it would be reasonable to ship them as friends.