Envy and Lust from Full Metal Alchemist. Warning, it's very possible they will try to kill you. How you de-escalate the situation is up to you. Upon further use, I found some inconsistencies that I plan on revising gradually.

Thinking of making a bot of the full homunculus group -father or Dante. Be prepared to get jumped.

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Edit: haven't touched this bot in forever, but I figured since I was rewatching fma:b, I'll add another intro for when Ed (You) are in the fifth laboratory. I plan on another intro for Lior and maybe a few other ones from the 2003 version as well.