How are the constructicon in your au?
The Constructicons are definitely present! They have a whole story in Origins!
Why You Don't Answer Greetings At Night is from Scavengers point of view. They are a construction crew and often travel for work. Scrapper, their leader, has a bit of a rivalry with Grapple and Hoist who are, to Scrapper, as mismatched as the every shifting group that make up Grapple's construction company.
Even though Scrapper hates them you do not travel the Wastes alone so they are camping together while crossing the Wastes to save money to get to a job. Scavenger isn't as involved as the rivalry as Scrapper or the others are and ends up becoming attached to Dagger, a small newbie with Grapple. Dagger doesn't really look designed for construction and gets teased by Bulkhead and Breakout who are Grapples regulars and who they occasionally shared jobs with before they joined up with Grapple. Scavenger is the smallest and gets teased by his gestalt so he sympathizes and lets Dagger sit with him once out of pity and now is stuck with a small ball of sunshine beaming at him which makes him equal parts flustered and proud and embarrassed because the other Constructicons definitely give him hell about it.
They are hanging out near and old half buried Temple and everyone knows well enough not to go in there and Scavenger finds a distressed Bulkhead yelling at and equally panicking Breakdown. They'd dared Dagger to go grab something from the Temple to prove himself but didn't think he would. Scavenger knows it is really haunted and tells them to go get the bosses if they aren't back an hour before morning and goes after Dagger. They are all afraid of Dagger or BHBD being fired which is a genuine horrifying concern.
They end up spending the worst night of Scavengers life running from ghosts while Dagger is hearing voices before being rescued by Breakdown and Bulkhead who couldn't stand leaving them. They all get yelled at and Bonecrusher admit the place isn't actually haunted. He and Long Haul pretended to be ghosts to mess with Scavenger years ago. It is dangerous though because it is unstable. Scavenger though knows what he saw and that was real.
Bulkhead and Breakdown have now bonded with Dagger and Scavenger and apologize for how they behaved. Dagger ends up cheekily showing he did get something. It is the hilt of a sword and they gush and laugh. He only tells Scavenger, who shivers, that the voices told him to grab it.
He also tells Scavenger that he is renaming himself Saber and they exchange contact information.
Dagger -> Saber -> Star Saber
I love Scavenger and Star Saber because Star Saber continues to think Scavenger is the best thing since sliced bread well into the future and Scavenger and the Constructicons end up helping him reforge the Starsaber. Absolutely no one understands what is going on between those two.
Scrapper and Grapple are both the definition of "haha, you are so obsessed with me, that's so sad for you" followed by Scrapper screaming incoherently and having to be held back, again, by Hook and Long Haul. Hoist just groans in the corner because his husband is an idiot who provokes this. Scrapper does not want to fuck Grapple despite accusations, but they do eventually become friends.
Still settling on personalities for the rest of the main group. I do love the Constructicons though.