The Tsihu use tech-enhanced kaiju as their "vehicles" and it would make sense they've augemented their own beast form.
I'm curious if these tech-enhanced kaiju are more tech than flesh. Or maybe the stronger forms have more tech in them and are barely organic anymore. If they have to chain certain forms to rein them in, then it would make sense for them to use technology to pacify their more feral brethren to a degree, so they can control them better.
So, they don't have ranks, but certainly some variants of the Tsihu will be far superior to others in terms of power and experience.
Speaking of experience...I imagined this ability, where they'd encase their own allies in some sort of time-bubble, and artificially accelerate their growth within the bubble, even causing mutations and then the forms those altered specimen would emerge in would be the beast-forms,
several different forms even, which may or may not need some control to keep on task, so they
don't go completely crazy and feral and start
attacking their own. Which could be possible.
Take out the ones holding the leashes and the kaiju (however big or small) could
turn on their own. And when that would happen, they could get buffs to speed, resistances...etc. (maybe not to damage and hp...or anything spongy), as they'd become more wild and more dangerous, without someone holding their chains.