[Oda isn't necessarily the most socially aware person on a good day, but he can tell that Maruki is uncomfortable. For some reason, entirely lost on Oda, Maruki seems to want to comfort him. All he did was share a past profession. Maruki has clearly been scarred by something.

[Oda tries to choose his words carefully, speak with consideration.]

Maruki...

If you did see me differently - if you do, and you're just saying you don't [Why do so many people say what they don't mean?] - I wouldn't blame you.

Knowing only what you knew about me before, you probably had a completely different picture in your mind.

It's alright, though. It isn't a secret. You know me a little better now. I'm glad.