Went down a list of names till I found one that I liked and that felt right. Checked the meaning/roots of the name to make sure I liked it. Checked the name against the popularity of the name during my birth year so it wouldn’t be too far out there. I’d skip that step now, but my goal was to go stealth early in my transition. Then I just used the name with people to see how it felt and make sure before doing the legal name change.
My middle name was easier since I took the name of a trans woman whose death was the catalyst for my transition to honor her memory/life.
As far as TV shows go, it wasn’t entirely purposeful but wasn’t accidental that my initials spell out a TV character I liked growing up. If it has meaning to you, don’t let anyone else tell you it’s wrong.
I’m not familiar with One Piece, but Eva sounds like a good name. It also reminds me of Evangelion which is one of the best and most influential animes.
And Battle Royale totally ripped off Hunger Games