Aihais

Aihais live on Mars, coexisting in an uneasy truce with the Martians. They live underground in hidden cities, where most of them worship the Great Old One, Vulthoom. Those that do, live out 1000-year cycles of hibernation and waking. The Aihais are generally a peaceful people.

In the RPG...

Aihais have no natural armour, though they may wear clothing that offers them some protection. Aside from SIZ, they have otherwise human-ranged stats. If they need to fight, Aihais will likely wield a disintegrator gun, which is quite nasty. Not only does it do an average of 17 damage, but also takes and average of 10 CON and 17 APP, none of which can be regained—not even the hit-points! The target's only saving grace is the fact that the Aihais have a paltry 20% accuracy with it. 

    Aihais didn't make it into the 7e Malleus Monstrorum, which could be due to the fact that they would only be encountered on Mars. While it's true that Mars would be an unlikely destination in a normal Call of Cthulhu game, I think it would be a great one for a Pulp Cthulhu scenario, and it's for that reason I lament their exclusion. I mean, an average Pulp Hero would even be able to survive a hit from a disintegrator gun, should they find themselves the target of one.

In a video game...

Because Aihais are a peaceful race and have no intentions of invading Earth—unlike the Martians—the only way they would really be encountered would be if the game went to Mars. Even then, they would need a reason to become hostile. Perhaps the Aihais would better serve as allies or NPCs in a game featuring the Martians.

In a film...

As they are not antagonistic, I'm not sure how you would work Aihais into a film, unless, of course, it was a film about the Martians.