Red with their child from C R O P H S, Gellian (with horns) and Cram (witch the double hat) from R83S, all by @guacas-among-us
Dr. Red, Imposter Red, Ghost Red and Crimson (all guys on right) are from Rodamrix Among us Animation and Alternate (watch it here: Rodamrix - YouTube)
The last one guy is from the official Among us Animated Series (here's the official Website: Among Us Show | Innersloth - Creators of Among Us and The Henry Stickmin Collection!)
That's Rodamrix Red and Red from Friday Night Funkin' VS. Impostor v.4. They would hate each other)
Back on my inverted bullshit again. This one is just downright Bad.
Also here's the Double Kill video if anyone wants it. One of my partners sent it to me when I mentioned wanting to invert Vs Imposter and I think my ears have been broken since.