Blue

Suddenly, he understood. As Finn started tapping twice at a time, like he had just made out the correct pattern, Blue realized he wasn't saying anything, but mimicking a sound.

The sound of his heartbeat.

He realized as his heart sped up, so did Finn. He seemed to be watching as Blue figured it out, tilting his head like he was asking what it was he was hearing.

Blue slowly brought his own hand up to where his heart was beating hard against his chest.

"It's my heart" He said.

He tapped against his chest with his hand along with his own heartbeats.

Finn's finger was still tapping as he watched Blue curiously. He parted his lips and it looked like he mouthed the word 'heart', repeating what Blue had said, though he couldn't be sure.

Finn brought his own hand up to his chest, and he smiled suddenly, sharply, if the sudden sharp teeth weren't a trick of the light, before all the surrounding lights shut off at once as the room Blue was in went dark.