90% of this quickie comics motivation was the "babe alert at 5 o clock. No, that's 3 o clock" joke.
Allocer has a bit of a fragile heart, but a very lustful body, so Agares has witnessed her start a physical relationship and the end up upset and heart broken because other person didn't want to take it as far emotionally as she did several times. It has also ganged up on other partners with Bathin and Astaroth after said heart break to induce some against being probably from a different universe who has SEEN ALL fear on them to keep them away from Allocer.
Agares doesn't trust these ex Free Pack members in general, but it especially doesn't trust this young on with its sister's heart.
Allocer thinks Festor is cute and fluffy and he is young enough that the thought she could actually take the lead in a relationship is exciting.
Festor is a 22 year old who doesn't have much experience and is still low key recovering from being experimented on since he was a child, but wants some to get his paws on fluffy spider boobs.
His brothers don't understand the non-mammalian preference Festor has, but after all the shit they went through with the rot and being experimented into super soldiers, if he's happy, they're happy. Also... If Festor gets in with someone who's been around the grounds for a while, then maybe they can be introduced to some fine folks to smooch on as well.
Also I realized while drawing this that the lines on his head might well be scars from the helmet he had on.
No where else to drop this HC, so I'll put it at the end. Allocer and Festor are both trans, and, they've bonded over having siblings who don't really experience gender dysphoria.