I see the possibility of Lili living to old age and dying peacefully. Surrounded by her gaggle of children both by birth and adoption and wrapped in the arms of the one that loves her most. But knowing her luck, she'll outlive a significant other lol.
The other possibility is her aetherical abilities overwhelming her and sinking herself into madness. I can't go into too much details of specifics since it'll spoil the upcoming plotline, but she'll basically forget who she is and have the worst case of identity crisis in the world. If it gets bad enough, she'll completely forget who she is. In the weeks it'd take to filter everything out someone may just decide to put her out of her misery not knowing she'd recover with time.
Other possibilities are her getting killed helping someone. Especially someone who tickles her maternal instincts. Which, frankly, could be anyone.
The other possibility is her aetherical abilities overwhelming her and sinking herself into madness. I can't go into too much details of specifics since it'll spoil the upcoming plotline, but she'll basically forget who she is and have the worst case of identity crisis in the world. If it gets bad enough, she'll completely forget who she is. In the weeks it'd take to filter everything out someone may just decide to put her out of her misery not knowing she'd recover with time.
Other possibilities are her getting killed helping someone. Especially someone who tickles her maternal instincts. Which, frankly, could be anyone.