[Keroko]

Originally Posted by Moczo

What confuses me is:

Spoiler for Red Saber:

Above and beyond the looking exactly like Arturia and the whole 'Why is Nero a girl' thing, what exactly did Nero do to earn a place as a heroic spirit? I mean, his life ended in suicide, and while the quality of his reign is debated, there's not many indications that he was considered a great hero of any sort during his lifetime. He certainly isn't widely thought of as one now.

I'm assuming this will all be explained in-game, but it's bugging the hell out of me right now.

Neither Medusa or Medea were particularly heroic either. Then we have Angra Mainyu, the very opposite of heroism, while Fate/Zero gives us the lovely child killer known as Gilles de Rais. Suffice to say that being a great hero isn't really a requirement, you just have to be well known.