From a certain perspective, taming a Demonic Beast Lady and taming a Pokémon is pretty much the same.
Find it, battle it, and subdue it after defeating it.
See, it's simple and straightforward.
However, the methods of a Pokémon trainer seem to be more...pure.
For instance, after finding a Pokémon, they summon their own Pokémon, defeat the opposing Pokémon, and after they have defeated it, they successfully capture it by throwing a Master Ball.
But a Demonic Beast Lady Trainer is slightly more complex.
Finding and defeating a Demonic Beast Lady is indeed the first step. But then a Demon Beast Trainer must use a "Capture Rope" to physically bind the Demonic Beast Lady themselves. And if the Demonic Beast Lady is unwilling to submit, they might have to employ a method akin to capturing them seven times in a row...