Her overconsumption of bananas is a sign of hypokalaemia
Her mental state is a classic sign and the underlying cause is probably her dying.
http://www.m.webmd.boots.com/a-to-z-guides/low-potassium-hypokalaemia
Or she's an ape.
>symptoms: weakness, tiredness
OP is an aho.
She's a perfectly healthy monkey.
>>161203369
>Weakness, tiredness
>Yoshiko is the most genki girl in the series
She was aho before Akkun showed her what bananas were. Or had moved next door. And if she was hypokalaemic she wouldn't be able to tear braided rope or break steel handcuffs with her bare hands.
>>161203369
Overconsumption would mean hyperkalemia, you idiot