Optimus prime would be fond of Rubble. Rubble's face reminds him of the time when Bee was younger. Sometimes Rubble would like to talk to Optimus prime slowly because he doesn't know if OP could hear him (he's not that old Rubble, Ratchet is way older and Rubble seem fine talking to him)

Ratchet would be surprised and maybe happy that Bumblebee had a minicon. He would definitely give Rubble a check up because of the abnormal size.

Bulkhead would be happy to talk to Rubble. Maybe even trying to play with him, Rubble is surprisingly durable at brawling.

Arcee would be amused with some of Rubble's stories (like picking up a kid from school and they go off about their day). Rubble is very open to her.

Jazz would be thrilled to have another music appreciating buddy. Though their taste in music is differing. Rubble would prefer Gamelan music (there's a pun in there)

Smokescreen would mess with Rubble just like he did with Bumblebee. It's surprising that Rubble only budges a little and only sticks with chatting though.

Windblade would definitely try to test Rubble's strength in combat. He is strong but Rubble is definitely a pacifist. Bumblebee said he isn't allowed to fight.

Ultra Magnus would definitely have a harder time with Rubble. Every single word coming out of his mouth just makes Rubble yawn.

Wheeljack would try to bond with Rubble... And it ended up with two charred bots, a bomb and a stern lecture from an angry Bumblebee.

Rubble might not be much of a fan. Any time he gets to chat with some of them, it always leads to politics and Rubble doesn't really care about that. But...

Rubble does like Optimus, Rubble thinks he's kind. But Rubble has overheard Bumblebee saying not so nice things about Optimus from time to time. So it's kinda hard for Rubble to understand why.

Rubble likes Ratchet. Ratchet reminds Rubble of Bumblebee's more grouchy side when Bee returns home from work.

Rubble likes Bulkhead. Same with Grimlock, he's happy to see another bot big enough to carry him.

Rubble likes Arcee. She's quite nice to talk to, doesn't seem to ramble on about politics and she would ask about Bee's behavior (Rubble prefers that). Rubble would sometimes call her aunty.

Rubble likes Jazz. Rubble has heard a lot of fun things about him from Bumblebee. They both have a fondness for some music.

Rubble likes Smokescreen. Smokescreen would be surprised that Bee had a kid way sooner at the end of the war. He'd ask a bunch of questions to Rubble (like how did he get that big? What did Bee feed you?)

I don't know when her actual birthday is since she's a fictional character from a cartoon. But if I had to guess how old she'd be in 2025 it's definitely 30.

The additional information was just for fun. I even made this.

I'll definitely make a fanfiction of her and Bulkhead reuniting.

And in other news, I made Jake the graffiti artist in my mystery seeker arc in Gacha too. And he's teammates with Sideswipe.