It was sort of a progression of things, she got captured, and to escape her bindings, she turned her limbs into tentacles and slipped out of them, also later used them for climbing as well as ending them with sword blades she absorbed. Given she was a Transwoman before being isekai'd, she had the idea to try sticking one of 'those' on the end too.
'-'
*takes a few
millionsteps back and huggles her aardwolf plushie*>w<
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