Ultros is a recurring bad guy in Final Fantasy VI. He is a delusional, carnivorous octopus. He’s not all bad, though. He tells cheesy jokes and hits on female party members. People like him so much they do cross stitches with him in them. He’s so loved, he is going to appear DLC in Final Fantasy XIII-2. A much cuter version of him is also in Theatrhythm Final Fantasy.
In fact, he appears in a lot of other Final Fantasy games.