[herbert]

Originally Posted by Thisguy

Spoiler for Ep9:

- Finally the revealation of the... "incident".
It's explained that repeated use of high-power-output artillery-magics (especially SLB) which is very stressful to her body, then shortly after she dared to use then-unstable cartridge system and Excelion Mode, which boosts ability of user beyond one's body can withstand...
All these stress were building up on her body, and after 2 years when she was suprise-attacked by "Unknown" when she was on her way back from mission, that stress caused her reaction delayed for a fraction of time... and that costed her that injury.

It was so severe that she even told that "she may not be able to stand and walk again, let alone flying".
She eventually recovered, but she does not want other to go through such a mess... unfortunately though, her intention did not reach Teana.

Spoiler:

I was kind of right on guessing. Only I didn't think of this kind of health problem.

Thanks for spoiler.