Since the Obey Me brothers are so attached to their MC and every single one of them have a animal form, why not turn into that animal and sneak out MC when they're at their school / work?
Mammon
That man has it easy, since he can turn into a crow that couldn't suppose any big danger since he can fly and more. Mammon could easily come through your classroom window one day, scaring everyone away in the process, and bring you whatever silly thing he got along the way. Did you know that crows, like parrots, can imitate human sounds? Well now you know Mammon even as a crow would speak to you.
— Look human! I found Lucifer's credit card, let's hang out after ya class / shift!
— Mammon, get the hell out of here.
The rest of the day he refuses to leave and remains either on your head or on your shoulder, occasionally asking for cuddles.
Leviathan
Now, now, Levi has things a little more complicated, since he's a snake so the only way for him to visit you in his animal form would be to travel through the water pipes to get to you, so imagine one day you minding your own business and hearing a terrified scream followed by another scream saying "A snake!"... What are the chances that a snake will enter the building? In any case, you know without proof or doubt that it's Levi.
— Don't hurt him! He's my... pet? Yes!
To avoid problems with your class / workmates, you decide to just apologize and get as far away as you can just to "scold" Levi for appearing like that out of nowhere, his answer? Get inside your clothes and spend all day with you hissing and moving when he's uncomfortable.
Satan
Yeah no, there's no way he's going to turn into a freaking unicorn, so he very wisely decides to be a cat! Of course! Very agilely he manages to follow you from home to your school / work without being discovered, he even successfully infiltrates inside the establishment! You only realize his preference when you hear many people try to call him saying "kitty!", then you turn around and as if it were a beautiful movie like reunion, Satan runs towards you and jumps on you only for you to catch him and start to purr.
— MC! I didn't know you had a cat!
— Me neither...
— What?
— What?
Satan is a micro celebrity around your class / workmates, everyone takes pictures of him and petting him... obviously failing in this, he is a surly cat that only allows and demands that you pet him and give him your full attention.
Asmodeus
Another one that wouldn't turn into his designated animal is obviously Asmo because "scorpions aren't cute enough" so what does he choose? Simple, a cute lop-eared bunny. Unlike the others, he tells you that he will go with you and gives you a nice bag to carry him in it.
— Your bunny is such a cutie! I love him.
— Sure, just... don't look at him in his eyes for too long... I don't want you to get charmed.
Unlike Satan, Asmo does enjoy the attention he receives and even, in his bunny way, asks you to change his clothes and does tricks! So all day he tries to get everyone's attention and when your teacher / supervisor tries to reprimand you for having him, he just charms them.
Beelzebub & Belphegor
Beel is a fly and Belphie is a cow and, although naturally they could be together in their animal form, I don't think it would be very convenient to take a sleepy cow and a hungry fly with you, so they are both a pair of cute ferrets. The way to get to you is by getting inside your backpack without you noticing, you discover them when you go to look for a snack to eat and you realize that there are only 2 furballs in the pocket, one sleeping and the other eating what was left of the snack.
— Awww Beel! That was my snack!
— Eek!
— Come here you both.
The rest of the day they spend in your pockets and table sleeping together or playing with each other, from time to time Beel will ask you for food nibbling your finger so get ready to spend money.
Lucifer
Lucifer doesn't care sneaking into your school work in his human form so why would he be using his animal form? ... I don't know, the planets aligned or something, besides, the only reason he would meddle in your day would be because his brothers are doing something with you that he does not particularly like. Don't be surprised if you're with one of the brothers (pets) and out of nowhere a black peacock shows up ready to attack.
— MC is that... a peacock !?
— No.... that's the devil himself.
Luci would not stay the whole day with you because he's a very busy man, but if you ask him, he could open his train (tail) to impress your class / workmates. At the end of the day, as always, he will pick you up in his human form and by car, he hates it when you go home alone.
