Guy Crimson/Relationships

Leon Cromwell
He views Leon as a valuable friend. He also makes sexual advances at him whenever a chance arises.

Velzard
Velzard is Guy's partner and friend. Guy views her as an equal.

Rain & Misery
Both of them are Guy's subordinates. Since Guy named them they've been completely loyal to him. He uses them as his maids.

Milim Nava
Milim is Guy's good friend and fellow demon lord. They founded the Walpurgis Council together. Guy and Milim have been acquainted since ancient times as both he and Ramiris quelled Milim's rampage after she lost her pet dragon.

Ramiris
Ramiris is Guy's good friend and fellow demon lord. They founded the Walpurgis Council together.

Guy values Ramiris very deeply as he threaten Leon Cromwell to become his enemy if he were to cause harm to Ramiris.

Diablo
They are old friends who often fought and competed with each other. They were once similar in power but Diablo stopped pursuing strength.

As the both of them are fellow Primordials, they've known each other for a long time.

Rimuru Tempest
Guy thinks Rimuru is very interesting and worth keeping track of. As seen during Rimuru's official welcome into the Demon Lord Council by defeating Clayman, Guy was amused by the latter's actions and was intrigued by his power. Guy himself even allowed him to give the Demon Lords a new name after Frey and Carrion stepped down and their numbers reduced to eight. During this time, Guy also made similar advances to Rimuru much like with Leon. Later, however, Rimuru would unknowingly angers Guy by upsetting the world's balance of power without knowing it.

Yuuki Kagurazaka
Guy is intrigued by Yuuki, he considers his ambition to defeat him and rule the world amusing. He's loosely operating under Guy.