Essence ofRumiko Takahashi Series

You gain a free age and appearance change to whatever you want.

You may also be any race from a Rumiko Takahashi series (youkai, oni alien, etc.) including hybrids like hanyo.

You are an incredibly skilled martial artist and ki user, easily being peers with Ranma and Ryoga. You may specialize in any style of your choice, no matter how outlandish it may sound or be (like martial arts tea ceremony). Your style could even be the famed Anything Goes style (which will probably not make you many friends, but whatever). You may also manifest a Battle Aura.

Your physical capacities become peak human in all areas, and you can reinforce yourself with ki to become even stronger, faster, and more durable. The more skilled with ki and martial arts you are, the better this effect is.

You are a really fast learner when it comes to martial arts and related skills, and can easily adapt the moves and techniques of other martial styles you observe and analyze into your own.

You have high amounts of spiritual power (reiryoku/hōriki/senki) and have received high levels of training as a Shinto priest/miko, Buddhist monk/nun, or Sage. Or maybe even all three. This grants you various abilities such as purification, barriers, making shikigami, and the like.

You have gained the skills of a Demon Hunter, such as tracking and weapon mastery.

Optionally, you may have a Jusenkyo curse of your of design or a copy of a canon one. Hope you know what you are doing with this.

Optionally, you may have the complete Shikon no Tama.

You may have any Rumiko Takahashi characters of your choice become your companions and may choose what relationships/history you have or will develop with each of them (being lovers, friends, etc.), if any, meeting them in positive circumstances. If you companion Ranma, you may choose if male or female.

Optionally, you may Self-Insert into any Rumiko Takahashi series (Ranma ½, Inuyasha, Urusei Yatsura, etc.) or a mix of them or a variant (like a fanfic). You may choose when, where, and what world. The specifics are up you; maybe you get dropped in (default), maybe you insert yourself into or replace a certain character, maybe you get reincarnated, maybe you get merged with a local counterpart of yourself, etc.

If you Self-Insert into the above via an Essence or other means, you are guaranteed to meet the chosen companions in-universe (resurrecting them if they are dead by the point you enter the story, which may draw attention).