Pictures that focus on the animal-like characters and their bestial instincts. From a casual 'meow' to becoming unhinged in a fit of rage. There are three types of entries that make this pool work:

Type I - characters casually reveal their animal side. Typically played for laughs.
Type II - characters use their characteristics for situational purposes.
Type III - characters grow unhinged and release their animalistic nature, whether it is by intention, impulse, or rage.

There's likely to be some confusion regarding which entries are credible. These are a few exceptions.

I. No "full" transformations (i.e. animalizations ). The ideal of this pool is the artists' focus on the characters' emotions leading to their transformations. After all, animalizations are often used for simple, comedic, or symbolic reasons.
II. Special species such as vampires and oni are a tricky case because they are capable of using their instincts while sane. What would make them credible is that theyd have to be Type III, acting by pure rage or blood impulses.
III. Much of the Youkai (those without much animal-like characteristics) in Touhou's cast are rarely portrayed in any feral manner. Such art that do exist are usually Type III.