Stupid AUs and Headcannons

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So I may or may not be working on an au and I have a ton of little things thought out about it so imma just dump 'em here.
Yogscast space au, where most of the yogscast are crew members of a ship called the "Yogs."
The characters I have put most thought into are Ben and Rythian, but heres a few things about each character I have any info about
Rythian: non-human species with two different coloured eyes. The species can't breathe in oxygen as it is toxic, so he wears a mask resembling a gas mask to extract other gasses that he can breathe made for him by Zoey. He also has purple patterns all over his body similar to that of a tiger. He also has small pockets of gasses in his hands that he can ignite to cause fire, making it look like he can do magic. He gets on with most of the crew besides Simon, Sjin and Duncan. He is incredibly protective over Zoey and will beat the shit out of you if you harm her.
Ben: on board AI who feels more comfortable having a human form on board to walk around with everyone else, although he still controls the ship.
Tom: an android who is designed to observe humans and adopt their behaviour, but he worked so well that he has gained the point of sentience, and he is incredibly sarcastic.
A few small story ideas:
Zoey and Fiona notice that Rythian has a heart shaped mark on his nose.
Rythian, Sjin and Duncan are stranded and they have to help each other to survive.
Tom and/or Ben become corrupted and everyone else has to work out how to fix them.
- Bob