It wasn't that Henry was less of himself in English. He was less of himself out loud. His native language was thought.

Look at this,' Henry called from a few yards away. His voice was theatrically shocked. 'I have discovered that, at some point, this side door was broken into by a teenage Korean vandal.

She's around here somewhere. Check your pockets. She could be there. Sometimes she falls into these cracks between the floorboards.

Henry shuffled the jewelled insect back out of his pocket. It amber heart warmed light through the pit again. “Back in the lab, of course, as father dear tries to copy it with nonmagical parts. My mother told me to keep this one to remind me of what I am.”
“And what is that?”
The bee illuminated both itself and Henry: its translucent wings, Henry’s wickedly cut eyebrows.
“Something more.

and Gansey, hearing the longing in her voice like he was being undone, like his own feelings were being unbearably mirrored.
I can't come? Gansey asked.
Yes, you can meet us there in a fancy plane, Henry said.
Don't be fooled by his nice hair, Blue interjected, Gansey would hike.
And warmth filled the empty caverns in Gansey's heart. He felt known.

I take it we're friends now," Henry said.
"We must be," Gansey replied. "Jane says it should be so."
"It should be so," Blue agreed.