Awesome playbook! It's funny, I'm not that familiar with Wei Wuxian or Aslan, but the character I immediately thought of was Steve Rogers (Captain America) - and the playbook is flexible enough that it could support lots of different variations on the same core archetype.
I haven't played this in a game but I made a character for myself just to try it out, and it was fun and made me think! I feel like all the lists do important work towards explaining the character type, while still leaving space to make interesting choices.
My favorite detail is how the items list asks you to pick an item you kept from before your "death", an item you got recently, and an item you hope to find. I've been thinking a lot lately about living in the aftermath of some big event, as if your life is made up of "before and after". And so I think it's interesting and poetic that the game asks you to pick an item from before, an item from after, and an item you still want- that shows you still have hopes for your future. Just because the life you lived before "dying" is over doesn't mean it's the end.
That's how I read it, anyway. But like any good playbook, the way you use it is up to you.