My scifi fantasy webcomic Everdream: Stars Hold no Boundaries has 3 main characters!
Cozmata Scavenger Cumulus is a young 13 year old girl living in the planet of Juuna with her adoptive moms. She is a quirky and smart little kid, who gets into trouble sometimes but always fixes it in the end.
Retired space pirate, Nimbus Cumulus is Cozmata's adoptive mom and married to Keen Scavenger. She manages their shop and cares a little too much about Cozmata.
Keen Scavenger is Cozmata's mom and Nimbus' wife, and well... She's a scavenger. An amnesiac one. She does not remember anything about her youth. She tries to be a good mom, and homeschools Cozmata on everything she needs to know. She loves reading, and has a library all for herself. She is also very knowledgeable about engineering in particular.