Mero was born in 2360 on Earth at Mercy Hospital. The only difference for Mero and the other children born that day was that she was human. Her parents met through a chance encounter at Starfleet Command. Her father was an attaché for the admiralty while her mother, an Orion, was coming to meet an admiral for a possible position.
Mero grew up in the main part of LA, but unlike most of the kids her age she found a fascination with weapons and martial arts.