Cocalus' Daughters

Cocalus' daughters are the daughters of Cocalus. They killed King Minos during his bath after he tried to hurt Daedalus, who was their teacher. One of the daughter's names was Aelia (which is the only named one in the series).

The Battle of the Labyrinth
When Minos came to their father Cocalus' palace to find the one who had mastered his puzzle. He talks to Cocalus and demands the traitor Daedalus to be brought to him. Cocalus says that Daedalus is a wonderful man and that his daughters have grown attached to their tutor. He invited Minos to dinner, one of Cocalus' daughters, Aelia, with the help of her sisters, decided to draw a bath for Minos in order to kill him. As Minos got into the bath the girls drop a few beads into the water which create chains that wrap up Minos like a mummy until he dies. Minos swears he will get revenge on the inventor before he dies though. Daedalus walks in and tells the girls they have done well, but he must leave. He presses a button on the wall, and the girls began to cry, know that their teacher was leaving them. When one of them mentioned that Daedalus hadn't mentioned secret passages, he corrects her, saying that the Labyrinth had been busy and expanding. With that, Daedalus escapes and the girls leave. Percy then wakes up from his dream.

Personality
Cocalus' daughters all have an interest in learning. They are also extremely loyal to those that treat them with respect. This includes Daedalus who acted as their teacher for many years. They praise and protect Daedalus because he has allowed them to have minds of their own, while also being loyal to their father who had protected Daedalus. They are also very conniving, being able to lure Minos to his death without him suspecting a thing until it was too late.

Appearance
In the series when Percy dreamed of them, they all had red hair like Cocalus and were dressed in blue robes. Minos thought they were extremely beautiful (as seen by his actions). Aelia was said to be a bit taller than her sisters.