Talam is Zebaba [link]
and Lucy Charm [link]
first born daughter. She doesn't have her father's second horn because her main mask feeds off the bad juju and negative emotions of the male ponies/colts she unfortunately makes miserable by manipulating and flirting with them, giving them false hope with her charm.
She doesn't mean to really be that way to be cruel. She doesn't flirt or manipulate her true friends. It's just with her always traveling and never staying in one place for too long, she doesn't feel the need to stop, since she has yet to stay in a town long enough to understand the consequences and heartbreak she's really causing.