Let's see...
First, Shelly leveled up to become a sphinx (well, technically, she already was, but didn't know it...)
- She took a level in Badass and in Wisdom (the sage of the forest)
Then, Monica leveled up, to become the Jaguar Girl (and assumes her role as Demon Shephard, role which may have been the result of her leveling up earlier, either with the calendar episode - key in the head - or even before - I get confused, with this...)
- She took a level in Badass, Power, and probably a few more attributes, including handling astral fire and regeneration
Later, Jin leveled
down, gaining human attributes in her programming, including feeling cold, pain, etc., and a limited lifespan
Some time later, Katherine leveled up and out of her shell, going on an adventure, and adopting two paranormal kids
- She took a level in confidence, inner strength, and probably a few more (feel free to contribute...)
Atsali and Castela leveled up, from being orphans, to being adopted into a single-parent family.
Atsali then leveled...
out...
And now, Tina 2.1 leveled up to Tina 3.0, complete with new sensory input.
Care to guess what other character will level up next? Almost seems to be a trend...