This drawing makes me think of Jack, Snowflake, and Shade (from left to right), except that Snowflake would be shorter + younger-looking and with a half-cape and shorter hair, and all three are missing staffs.--- no it's Katsa Fire and Bitterblue
I'm pretty sure they both have parents. Well, Weiss would want to get away from her father. I THINK we got a good glimpse of Blake's parents in the Volume 4 Opening. Don't believe mee? take a good look at the two people by Blake after Sun appears.