Basically the Satyrs from God Of War but they only appear once so I don't want to commit war crimes while fighting them

These guys are really cool enemies for being random not-particularly-hard mobs that you only find in one very specific zone in Drangleic Castle, they have very stylish movesets and a cool design.

The horse one can break your guard and does what looks dancing moves

easy to take out using a heavy curved greatsword. make sure to apply a magic buff too, as they are very weak to it. i like to behead the first sleeping knight, body the second, and wait until the third and fourth ones are both in my swing range. then, 2 hits will clear them out easy peasy.