No. 5: Freya – Star Ocean: Till The End of Time

She may seem like a cute little Norse mythological figure, but this tiny package packs a powerful punch. Arguably the strongest optional boss in Star Ocean: Till the End of Time, Freya requires all of your party members to be at level 255 (yowza!), and equipped with Boots of Prowess. She’s got a whopping 20,000,000 hit points that take quite a while to whittle down, even if your characters are super buffed. Freya’s so badass that she’s even more powerful than the Star Ocean series’ signature hidden boss, The Ethereal Queen.