Fate/Apocrypha/YMMV

• Broken Base: Jack the Ripper. The Type-Moon fandom seems split right down the center between those who think she's either a viable interpretation of the Ripper (and often times just plain adorable), and those who hate her for the fact that the most infamous serial killer of all time has been made into a Stripperiffic loli with mother issues.
• Ensemble Darkhorse: Shakespeare.
• Game Breaker: Karna. Oh, dear, where do we start? He’s clad in Nigh Invulnerable armor, and his basic noble phantasm, Brahmastra, is an Anti-Army attack that can’t miss. He can power said basic Noble Phantasm to turn it into Brahmastra Kundala, an attack with the power of modern nuclear weapons and Anti-Country rank. If that wasn’t already enough, he has a final trump card, Vasavi Shakti, which is a spear of pure mortality that has an Anti-God rank.^[1] But Wait! There's More! He can automatically discern an opponent’s true character with a single glance, he cannot be deceived by actions or words, any weapon he grasps will burst into flames and unless his opponent knows who he is they will be deceived into thinking he's weakear than what he actually is. If it wasn’t for his sub-par stats, the fact that Brahmastra can't be used on those with greater skill than him, and Vasavi Shakti only working once and needing Karna to sacrifice his armor permanently, this guy would surely win the war in a night and without breaking a sweat.
  • To a lesser (or higher) degree, Shakespeare. His First Folio can alter the outcome of an event he's witnessing in a manner similar to Save Scumming.

1. ↑ To put that in perspective, Gilgamesh’s most powerful weapon, Ea, is Anti-World.