I love Maryse, she's seemed like a bitch at the beginning but once you read more about her you can tell that she really loves and cares about Jace as much as her own children, and that she'll do anything to protect him, including betraying the Clave
I like Jocelyn too, you can tell how much she loves and cares for those who she loves, she'll do anything for them. I also liked when Jocelyn went to see the Iron Sisters with Isabelle, it showed that she was strong and still had Shadowhunter-ism left in her, and then when she went to fight to help Clary and Jace with Maryse, Alec, Isabelle, Simon, Magnus and the others, I just really like Jocelyn.