[It's not surprising to be angry about that really. Serving under someone who he'd believed in for 4 million years, committing atrocities under his name and fighting against their enemy, only for him to defect to said enemy team without a word?

Who wouldn't be angry at that?

At least, he had calm down.]

Hm, I suppose that is true.

[Now that is settled. He just have two simple question for Soundwave.]

Tell me, Soundwave. What is the Decepticon cause to you? And do you view the organics here as our enemies?

[Depending on his answer, Soundwave may or may not have to keep an optic on him.]