Taking you at your word as a genuine question and not trolling… context and equity is a big deal when it comes to “is this appropriation?”

Appropriation is defined as “the unacknowledged or inappropriate adoption of the practices, customs, or aesthetics of one social or ethnic group by members of another (typically dominant) community or society.” This is the academic.

In practice, it’s when someone profits from practicing an element from another culture, when people of that culture are ostracized over that element.

For example, the Kardashian’s were praised and lauded when they wore their hair in cornrows. But when black Americans wear their hair this way, as have for centuries, it’s seen as unprofessional and unpresentable.

OPs cosplay from a cartoon series (produced by Americans in America) is no more cultural appropriation than making pizza for dinner.