Imagine if tfa autobots and decepticons met a sparkling that is like Frisk from undertale, the little one is by far a neutral, yet is friendly with both sides, but the little one hates humans for some reason, getting them to be around with Sari can be difficult. How will they react?
No one knows where the sparkling came from or if they were a machine brought to life by AllSpark fragment, but despite sparkling's small stature they already have an alt mode, a small scooter.
Optimus tries to talk to little one and find out where they came from, but they don't really speak. They stare at him and smile a little, but that's it. He makes Ratchet check if they are hurt or worse.
Ratchet checked and the little one was totally fine. The muteness is their own choice. He kinda likes how quiet and sensible they are.
Bumblebee and Bulkhead try to play with the little thing and adopt the role of big brothers easily. Bee enjoys playing games with them and Bulkhead encourages sparkling to express themself with art. They are having tons of fun with the sparkling.
Prowl can tell that they are not ordinary sparkling. The moment their optics meet, he can tell that this sparkling is strong and out of both Autobots' and Decepticons' reach.
The only thing he couldn't tell was if they are on Autobots' side or not. They did play and amuse the rest of the team, but Prowl could see that there was more.
When he would catch the sparkling on their own, he would ask them who or what they were and if they were going to hurt his friends, because if that was the case, Prowl would protect his friends in a heartbeat.
The sparkling would stare at Prowl long and hard before smiling and raising a single servo over their lips as a mark of silence. The cyberninja doesn't know how, but that simple gesture hit him deep and hard, leaving him stunned.
Before he knows what happens, the sparkling hugs him, and Prowl feels... Better? Like he was being healed. Before he can ask, the sparkling hugs him one more time before leaving to play with Bumblebee.
Megatron is old and wise and could tell that they were no ordinary sparkling. He could glare down at them and they would look back at him with neutral expression, not even one bit intimidated by the warlord.
Lugnut is suspicious and he is loud about it, but Megatron orders him to quiet down and he does so in a second. He does mumble and grumbles about sparkling stealing Megatron's attention... But then they bring him a small can of oil and Lugnut is taken by their thoughtfulness and starts thinking that the sparkling should follow Megatron's example and become possibly the future leader of the Decepticons. Starts to worship Megatron and sparkling.
Starscream immediately dismisses the sparkling. He doesn't have time or any desire to take care of them, he is too busy trying to come up with a master plan to offline Megatron and take his rightful place as the leader of the Decepticons! Sparkling may listen, but they don't take part in Starscream's schemes.
Blitzwing has mixed feelings about them, surprise surprise. Icy tries to come up with a reasonable explanation for why they suddenly appeared there in the Decepticon hideout, but he gets nothing out of them and this tends to drain his patience and cause Hothead to take control.
The heated personality gets up close and might try to threaten the sparkling to speak, but they just smile and gently pats their red face, much to his confusion. Why aren't you scared of him!? This makes no sense!
When Random takes control, the little one amuses him without a word. The chaotic side of Blitzwing would dance and sing and sparkling would dance and play with him, but not sing.
The Bots and Cons come to agree that the sparkling is a special case. They are so small, yet so mature... They even might know something others don't?
They do not like humans though. As soon as the sparkling sees Sari approaching, they turn around and leave without a word and no one knows where (Decepticons)? It might take a day or two until they feel like they can tolerate Sari's company.