Taichi manages to defeat the Red Element with the power of the wind spirit, Aerial. So when he speaks to Lemia about hearing the spirit's voice and using her power, she pronounces him a Summoner. While he feels like that power is just another cheat, he heads into the city to find Rin and Muller. Along the way he rescues a woman being harrassed by some men, but that woman seems familiar somehow...
Because of that, 
they're fundamentally invisible to us.
.بسبب ذلك، إنها غير مرئية في الأساس لنا
Und deshalb ist uns nicht vergönnt,
sie sehen zu können.
Por eso generalmente no podemos verlos.
Por eso generalmente no podemos verlos.
Per questo praticamente sono invisibili ai nostri occhi.
Por isso, eles são fundamentalmente
invisíveis para nós.
Потому духи абсолютно
невидимы для человека.