ideas for books

Mc would get stronger by using the predator skill on grimm to get their skills

I want mc to help ruby on the dust store robery on episode 1, so mc can use predator on that fireball cinder launches and unlock magic there, so i need to make it so mc and ruby are already good friends by then at least. I wanted for mc to meet young(todler-kid) ruby in the woods near her house and ask her about the world's history and common sense, by the end of the first day meeting ruby, i will need for mc to analize ruby with predator so mc has a human form(mc will obviously NOT kill and eat ruby's body, instead mc will get her permission and swallow her alive like og rimuru did with veldora, mc will then spit her out alive and well seconds later when great sage finishes the analizes), mc's human form will look just like ruby but with blue hair(no, mc won't have silver eyes because great sage was unable to fully researsh and replicate them without harming ruby(my excuse to NOT give the mc an "insta-kill all grimm in the area" button, as that would be boring), great sage will inform mc of the magic in ruby's eyes but advises mc not to bring it up, as they had no way to activate the dormant power and it would be pointless to inform the girl that she has a power she can't use, that on top of it beeing kinda cruel(my excuse to NOT give ruby early acess to her eyes' powers, as again, that would be boring)). I kinda wanted mc to be adopted as ruby and yang's sibling at some point, but i can't see mc NOT opening up to the family about not beeing human at some point and that therefore reaching ozpin's ears, and i don't want that, so instead, mc will just be a neighbord, using predator on some trees in the area and using them to have great sage manufacture a cabin inside the stomach and then spit it out on the new clearing. Have ruby visit and bring mc books in the first few days so mc has a good grasp on the world, mc had to eat, but they could live just with the stuff in the forest. Now that i think about it, have mc meet ruby about a week before the dust robbery instead of when ruby is a todler, as it will be more understandable for the friendship between ruby and mc to progress not enought that ruby introduces mc to her father (and most likely her sister as well) but enought that they are hanging out toghether. Having mc read about dust, being curious about it, ruby giving mc a sample of fire dust to analize, mc realizing it is just solidifyed mana and therefore easily recreatable with their body and great sage's help, mc beeing told by great sage they could only replicate fire dust and not the other types of dust without analizing them first, mc realizing they realy should analize a sample of every kind of dust in existence so they could have even the rarest forms of dust available at all times, mc telling ruby about the discovery and plan, ruby telling mc that she was planing to go to a dust shop later and inviting mc along, yup, now that i think about it it is quite a smooth sequence of events

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Edit1

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I want mc's first interaction with ruby to go something like this:

Mc:"excuse me"

Ruby"*turns to the sound of the voice and sees no one*"

Mc"down here"

Ruby"*looks down and sees a blue blob on the floor next to her feet**squals in confusion*"

Mc"hey there, so i am sortof new to this universe, would you please be willing to teach this stranger about this world's common sense?"

Ruby"you're an alien?!"

Mc"tecnicaly i am from a diferent universe, so i guess that counts"

Ruby"wait. If you are an alien, how are we speaking the same language?"

Mc"as you can see, i don't even have a mouth like you do, so i am not realy speaking, i am just radiating my comunication intent and your mind is picking it up as your dominant language, i am likewise just reading the intent on your words, i don't even know what language you are speaking at and most likely woulden't even notice if you started speaking another language all of a sudden. It is a low level of telepaty if it makes it easier to understand"

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Tensura's monster naming system won't exist here in this fic

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Neither mc nor ozpin will be leaking any mana when they first meet in the interrogation room with ruby and glinda, so neither will detect that the other is a magic user(or magic beeing), ozpin will invite mc to beacon alongside ruby as both a gesture of goodwill towards ruby. Mc looking like a twin of ruby will be explained as a crazy coincidence as they were not realy related, and that they looking so similar was what drove them to have their first conversation and that they became fast friends afterwards

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About mc's team at beacon, if i can't think some bs up so mc gets to be in a 5 member team with team rwby, then mc will be at team rwby and replace yang, yang will in turn replace jaune in team jnpr, lie ren will be the new team leader and the team will be named "lupin"(L(lie ren)P(phyrra nykos)Y(yang xiao-long)N(nora valkiry)). Both teams will still be close like canon

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I think i will make ruby try to unlock mc's aura soon after the beacon invitation, but i am leaning on great sage blocking it, after mc asks great sage to let ruby unlock their aura, great sage will warn mc that great sage itself is using the "light of the soul" as an energy source, and that repourposing it to fashion the skill called "aura" would result in a weak "aura" skill and also be detrimental to the great sage skill and asks mc to confirm if they realy want their aura unlocked, mc will then decide to remain without aura unlocked