All three of your partners have their little quirks and idiosyncrasies, and it's why you love them so much.
Thundercracker is shy and dislikes conflict, Skywarp is an idiot who loves practical jokes, and Starscream is... Well, Starscream is himself, and that's strange enough in of itself.
But, they also have some things in common. All being clingy and murderously protective of each other and you, all of them pretend to hate each other, but most curiously of all, all of them seem to have their own little language of chirps and trills.
When one Seeker lets out a chirp or a trill, the other two immediately perk up in interest.
It took you a little while to figure it out, but each little sound conveys a different emotion.
Starscream normally makes high-pitched trills that have Skywarp or Thundercracker coming to his side to give him some attention, as well as lower-pitched chirps when he's hurt.
Skywarp tends to make high-pitched chirps when he's over-excited, as well as lots of short clicks when he's anxious or anticipating something.
Thundercracker on the other hand, is the least vocal of the trine, only making low trills that count more as rumbles when he's content.
However, when one of them is hurt, usually Starscream, all three Seekers curl up on their shared berth, shielding the hurt one from the rest of the world, and let out deep, comforting vibrations.
In fact, the four of you are curled up right now. There's no sounds being exchanged, until Skywarp shifts a little too carelessly, causing Starscream to let out a high-pitched yelp of pain.
"Watch it!" He hisses as Skywarp mumbles an apology, accompanied by a low-pitched chirp.
"To be fair, Skywarp probably wouldn't have kicked you if you didn't take up half of the damn berth all by yourself," Thundercracker muses, an amused trill escaping his vocaliser.
Before anyone else can say anything, you finally ask them about the chirps and trills, only for Skywarp to light up. "You wanna learn what they mean and how to do them?"