Once Raiden destroys Execelius and calls Armstrong out on his selfish 'goals', the man gives off a look that just says 'I like you kid.'
Raiden, on the other hand, is very confused. After Raiden tells him 'Maybe I was wrong about you', He picks Raiden back up, dusts him off, and gives him what can only be described as a handshake and a brohug at once, briefly showing that he not only has room to forgive, but genuinely wants Raiden on his side.
