JoJo: Ben Ten's Bizarre Aliens

So this is based on an idea I randomly had and this is where I'm going to flesh it out more.

Origin Story
Ten year old Bentaro Kuten is forced to spend his summer vacation in America with his Grampa Max Tenstar his adopted daughter Gwenzuka Tenstar, also 10.

Yare yare...

When going on a walk, Bentaro discovered the crash site of an alien pod containing a strange watch. The pod opens up, prompting Bentaro to reach out... The watch latches onto his wrist, fusing in place.

After a minute of trying to remove the watch, Bentaro decides to figure out what this device is. Pain shot up his arm and he felt an unusual sensation. The pain ended but he started the feel some heat behind him. IT WAS A EVIL, BURNING DEMON!

He ran and ran but the more he ran, the more the forest caught on fire.

Meanwhile
Max and Gwen are discussing something important when they see a fire in the distance.

"OH MY GAWD!" Max exclaimed, dropping his hat.

"That's in Bentaro's direction!" Gwen shouted, slowly turning transparent.

Max placed his hand on her shoulder, "Focus! Breathe! I'll go get him!"

As Gwen returns to full visibility, she races after Max who in turn rushes towards the fire.

Back To Bentaro
"So I'm immune to fire because I have an evil fire spirit inside of me. Yare yare daze..."

Bentaro sits on a burning log, holding a burning pinecone, unable to wrap his head around his predicament.

Out of the corner of his eye he sees Max and Gwen, looking for him.

"Stay back!" He demands, "I'm possessed by an evil fire spirit that will hurt you if you get too close!"

Gwen facepalms.

Max stares at Bentaro, "Get up. You're not possessed."

"But I'm immune to fire and this ghost thing is inside of me!"

"That ghost thing is called a stand, I'll explain back at camp!"

Back At Camp
Max and Gwen reveal their secret powers over roasting marshmallows.

Grandpa Max has thorny vines growing out of his arms named [PLUMBER PURPLE] and Gwen can turn herself and nearby matter invisible with [ACHTUNG GIRL ACT 1]. They explain that those with stands can see other stands and only stands can affect stands while stands can affect the natural world.

"Okay, so how come you two get cool super powers and I get a fire monster?" Bentaro complained, suddenly surprised by said fire monster sitting beside him, roasting his marshmallow. "Can I control it, Old Man?"

"Don't call me that. And to answer your question, it is an extension of your fighting spirit that stands with you!" Max replied.

"Am I going to have this thing forever? I don't know if you've noticed, I don't have great control of my temper. I don't want to [HEATBLAST] everything that ticks me off!"

Gwen chucked, "Heat blast? Over here we say 'burn'."

"No. That its name. [HEATBLAST]. Am I not allowed to give my power a cool name?"

"Dingus, what's the point of naming something you don't want?"

"I don't want you but you have a name!"

"Benjaro, Gwenzuka! Stop. This is serious!" Max interrupted.

A beeping sound could be heard from [HEATBLAST]