Ah how we forget the one who started all the toubles for the O'Brians that aren't got to do with Laurence's work? 
Emma is Logan's former girlfriend and someone who use to be a good friend of Zeke and Zander's. Emma was once seen as a rather kind and gentle person; she was upbeat and was ready to defend those she cared about at the drop of a hat. However, after the time Logan and Zeke had to stay with friends due to a buiness trip Laurence could not avoid. He trusted The Seymours with Logan and Zeke to Zander and his father. 
Emma and Logan were in a relationship at the time; a hidden tension was there but not enough for anyone to notice. After the time of Logan staying with her, there was a sudden dark turn out of her; his treatment got worse and worse. She wasn't the kindest to Logan as she let her true colours show. 

After his death, Emma and her parent was taken to court thanks to Laurence. Zeke wouldn't let her get off so easy.... (not spoiling what happens) 

Emma's a cunning and down-right deadly woman underneath that mask; not a pleasent woman to be around. her behaviours are rather toxic. (Keep other characters far away from this one!)

(voice description: Emma's voice is pretty strong for a woman but it's not deep like a man's. Her voice sounds very sly but in a subtle way. She knows how to play it cool with her faking. She too has a Detroit accent just like Zander).