He knew something is wrong from the moment he saw him walking into the hall. His usual aurora of arrogance is gone. His hair is longer. His appearance has aged. He embraces him tightly, whispering over and over again that he is sorry, sorry for everything, that he will always love him no matter what happens, and he will forgive everything about him. And when they parted, he sees tears in his eyes.
“…do you understand, brother?”
This is his brother, yet this is not his brother. No, he doesn’t understand. And this scares him.
* (time set after Thor’s banishment and before Loki discovering his origin)