I'd prolly be a sort of tsukumogami, something about the idea of becoming more than what you were intended to be just resonates with me. As far as I know tsukumogamis are objects that gains consciousness or a spirit after existing for 100 years with varying tendencies being either out for your neck or just vibing.
Actually the reason why I like the idea of tsukumogamis is that one of the first mangas I read (actually the very first) was one about tsukumogamis and in that story they use their powers to be of use to their owners or to seek revenge on humans for the abuse/slavery they had experienced. I really love this idea of building ones identity to be more than what they were made/destined to be and how they decide to use their newly obtained awareness of their existence and the potential they hold within them. Existentialism, basically.
As for what kind... I'd say a Kameosa which is just a living, walking, talking jug. It is always filled with water and never seems to run out and so it just becomes a free water source for humans and thus are welcomed by them, and the Kameosa are grateful for it. But technically a jug can hold other kinds of liquid... and water would be too plain and boring... so I will choose my favorite kind of liquid, brandy! Let my presence be known throughout Gensokyo by the strong musk of alcohol looming from across the field! I'm not even sure if they'd like the taste, but it's not about the taste of the liquor... it's about how quickly it gets you hammered! Since youkais in Gensokyo take the appearance of humans most of the time then I guess I'd blend right in with the human village but it would be obvious that I'm not human since I would be suspiciously inseparable with a bottomless jug of liquor. I would spend my days doing menial works but at night or weekends I'd be asking humans and other youkais alike to go drinking with me, afterall, it is more fun to take a swig of the happy juice with the homies and get destroyed together than alone. I don't care what you are, a fucking banana tree, a loner cat, shapeshifting trash pandas, beings of god-like powers, I'm gonna walk up to you and offer a some shots and preferably with a game accompanying our little break from this world.
As for what I'd be in a touhou bullet hell game I'd prolly be the extra boss that tried hiding away from the incident resolvers cuz some dudes with god-like powers got heated over each other on the previous nights session and are now wreaking havoc and no way I'm gonna get caught for being the reason an incident occurred even though I didn't intended it to happen. But also think about what I can do assuming I can bend the liquids that I produce, I could make it hard by not necessarily having difficult patterns but by inflicting a debuff with each time the player dies by my hands like I'm slowly getting them drunk. Each deaths makes the screen hazy and can make them see double or triple while slowing down movement at random intervals that gets more frequent with each death. Definitely annoying and unfair to fight but hey I'm just a dude with liquor I gotta fight dirty, it's all I can do.
