Beelzebub/Relationships

Satan
During her conversation with Loona, Beelzebub stated that she sees Satan as brother figure. However, she also admitted to being attracted to him, having contemplated and stating that she could "hit that" when remembering the time she saw him shirtless for the first time.

Belphegor
During her conversation with Loona, Beelzebub implied to have a close relationship with Belphegor, even referring to her with the affectionate nickname "Bel". Beelzebub apparently has the habit of stealing "party drugs" from Belphegor to use in her parties. Enough that Belphegor has placed additional security by changing the locks on her cache of medicines and pills to stop Beelzebub from taking anymore. Later after she failed to steal some of her drugs, Belphegor calls Beelzebub a "jackass" for trying, but Beelzebub herself was unaffected by her insults and instead takes it in stride.

Asmodeus
While not having been shown interacting, it is implied that Beelzebub has a close relationship with Asmodeus as shown by the picture of the pair kept on Asmodeus' fridge in his tower in the episode "Oops".

Loona
Upon meeting Loona, Beelzebub immediately developed a liking of her and declared her she was her "new favorite person" albeit she also stated Loona was "freaky".

When Beelzebub and Vortex tried telling Loona about Blitzo's behavior at the party the two offended each other and nearly started a fight until Loona, not wanting to endanger her friendship with Vortex, relented and went to check on Blitzo. When Loona was out of sight, Beelzebub apologized to Vortex and voiced her concerns about Blitzo and Loona, hoping everything worked out for them.

Blitzo
At first Beelzebub was having fun taking Blitz on in a drinking contest. However she became concerned when Blitz started overindulging on alcohol and causing problems at her party.

Vortex
Beelzebub is Vortex's girlfriend. The two are shown to have a loving relationship and care about each other a lot. Vortex seemed concerned and uncomfortable with her and Loona fighting.

Вельзевул/Взаимоотношения