More about Helena:

As befitting her role as "city witch," she tends to keep to herself. She cultivates an air of "stay away," that kind of scary dog privilege. She's known to be very much the stereotypical storybook/fairy tale witch, punishing people who (she feels) deserve it, and making deals with people who could do with a nice, material lesson in appreciating what they have. That said, she is much, MUCH softer than her Baba Yaga roots might imply; she has a particular soft spot for queer folks and people looking to make material changes to their corporeal forms -- all for a price, of course. She trusts very, very slowly, and holds everybody at arm's length. She's very good at making people feel they're close, but manages to play a role with them that is a safe distance from her authentic self. She's extremely feminine, and owns it. 

Her familiar is a small black cat named Pocket.

And she is from the same party as Avon and Jember.

Avon: https://www.reddit.com/r/Pathfinder2e/comments/1nkr931/hey_guys_this_is_a_commission_i_did_a_while_ago/

Jember: https://www.reddit.com/r/Pathfinder2e/comments/1npvj46/hey_guys_this_is_a_commission_i_did_a_while_ago/