I actually went and did a quick doodle-colour of this set of nostalgic PC game doodles. Chances of being actually cleaned up digitally = high.
From top left to bottom right complete with geeking out over childhood:
This is Blasternaut, the (usually) main character. I'm sure I had a crush on his voice when I was a little brat. He's got a wrist analyzer named Froyde that speaks in a Sassy Gay Hammy German Accent. I shit you not. It's awesome. He's replaced when Knowledge Adventures got the series with a blue-haired guy named Max Blaster, who I guess is alright. (The latest character developments/recent updates to him last I saw are like what happened here.)
The purple-haired girl is Galactic Commander aka GC. For a Galactic Commander she was pretty damn chill. I can't remember if GC was playable, I'm sure she was in the 9 - 12 Math Blaster from Davidson, but anyway, Knowledge kept her hair when they changed her for their adaptation. (I totally shipped Blasternaut/GC and Max/GC together. Just so you know. Unless Max and GC were siblings. Then fuck that.)
Spot is that robot droid. He gets kidnapped a lot in the Blaster saga because his robot brains are just overflowing with intelligence. He becomes a technobabbling sidekick as the series progresses - which I have no complaints about, he's adorable.
So is Rave, not part of the Blaster Pals but a still notable character. Reading Blaster was one of my favourite Blaster games, despite being very different from the normal Blaster Pals saga. And Rave, the main character - who has to put up with a bunch of floating jewels that is Lydia the Ghost/the Voice That Guides You while dealing with a SHIT TON OF SCARY SHIT WHEN I WAS YOUNGER OH GOD THE CATACOMBS - is incredibly adorkable. (There was an Algebra one with Rave in there too but he was like this cool, level-headed kid. I preferred super scaredy Gloria Ghastly fanboy Rave. <3)