Magical tools masters normally can't use magical tools, but Roji realizes that Rio used one to protect Bico. Meanwhile, Muhyo has collapsed after exhausting his ren, leaving him in a dangerous condition of mental numbness... the exact moment Rio has been waiting for.
That doesn't mean they have 
zero ability to use them.
لا يعني ذلك انعدام قدرتهم تماماً
Ist nicht so, dass sie es gar nicht können …
No significa que no tengan
la aptitud para hacerlo.
Ce n’est pas toujours vrai.
Questo non significa che non abbiano
la capacità di farlo.
Isso não significa que eles não tenham
nenhuma habilidade com elas.
Это не значит, что они
совсем на такое неспособны.