Yoooo! Nice pulls, when you get multiple copies of one character they become stronger (you can check it in the menu to see in which way they get stronger)
Me: Ah, he meant broke as in he's out of the Signal Tapes. Noblewolf: (Pulls up Signal Shop) Me: Oh no. The first thing to learn about Gacha; Restraint! XD
got a Seth dupe, anyways to answer one of your questions, Duplicates of a character gives them extra buffs and mechanics, it doesn't mean you have 2 Anbys for example, just 1 stronger Anby