Altasgracias is a being with a female body, very long dark hair, and three, distinct conjoined faces and voices. She is the result of three sisters who were all due to be married, but did not want to be wedded. They prayed to the Miracle for aid, and in response their hair continuously grew and enveloped them into a knotted, hairy egg: inside, the three sisters became a single fused being with a feminine body and a long mane of hair and beard that shrouded her.
It is implied that Altasgracias and Tres Angustias are connected, and it is possible that the boss symbolizes the anguish and pain of the three sisters, hence the name "three anguishes".