Ch75. Answer

It was hard for Miles to keep detached from his boiling anger, while using it to its fullest extent.

Pretending to clash against Shinji with nothing but inflamed recklessness.

 

Ever since the first time he had drank from the [Ethereal Teapot], he felt like something inside him had changed to a fundamental level, but he had never been able to understand what it was or how it worked, whatever it was. However, he knew it had something to do with his sight.

With the way he perceived the world.

Or at least some things in it.

Seeing the Queen of Heart's wraith in the ruined castle had been the very first time Miles was able to get a glimpse of the truth about that change.

She had a physical body and was as tangible as to be able to physically deal damage to both him and Diego. Even though Diego only got hurt because he physically attacked her.