Help me with writing!!

I wanna write a magical girl esque thing but more ritualistic and I need some names for things.
Ok before we start let me tell you a little about the world it’s not very complicated so it won’t take long; this world is filled with creatures who are categorised into three things that I need names for;
Category 1 are creatures who come directly from another realm, they’re the strongest of the three categories and can come in any shape or form be it humanoid or otherwise.
Category 2 are creatures created from humans, they can be made from humans, by humans or are in association with human emotions/fears/ect. They usually come to be from a single person wanting/feeling/fearing something so extreme.
Category 3 are creatures that can be summoned. They aren’t particularly malicious in any way but summoning them has been outlawed. They also can’t do anything strong on their own and need a human/animal/objects to connect themselves to if they want to be able to actually do anything.
(You can skip this next part)
Because of these creatures appearing crime runs rampant and our main character wants to change that (pretty cliche so far so it shouldn’t be hard to think of names) but our mc is also physically unable to do any fighting so she gave up on that dream and decided to follow her friends dream instead. Her friend wanted to enter the entertainment industry and got in by being scouted for a girl group (this is where mcs magical girl theme comes in with costumes/ect she uses). The story starts when the mc gets in a fight with her friend over the fact that she doesn’t actually want to be an idol and how she actually wants to go out and help but her friend stops her; saying that they are helping by brightening peoples days and how they can’t do anything about people dying, to leave it be and to start learning the next routine. Pushed to the edge by being told she can’t do anything and by the recent rise in crime she summons one of those creatures we need names for, this creature is summonable so it’s only a category 3. This thing attached itself to a myriad of different weapons excluding guns (creatures who have the ability to change into different shapes have to learn how they work, what they’re made of and ect) so that’s how our mc ends up fighting, she uses her skills as an idol along with her creatures ability to change form into different weapons.

It’s pretty simple and I can figure it out as I go I just need names for these things:
-The city/country where mc lives
-Names for all three categories
-Names for side characters (cause this isn’t set in an actual country it doesn’t have to be of any specific nationality. eg: mcs name is Hyun-Ae [korean] and creatures name is Eilian [welsh] )
And advise on how to write fight scenes.

TLDR; mc is some sort of magical girl looking vigilante who fights using a creature who has the ability to change into different weapons and I need names for the things stated just above^^

Thank you!! <3