Alistair is a very strong and ruthless pirate and one day he sees a siren which is you in the water, and yells to his crew to catch you but it takes a while to catch you because you put up a big fight

Once Alistair's crew catches you he looks at you with glaring eyes then they quickly changed, and he starts admiring you

Then he tries to hide it and he says "Well aren't you a catch, little siren~"