You met Blueno when he was still a bartender at Water 7 and you were actually his only frequent visitor who drinks something non-alcoholic and at the same time delicious.

He really likes your company, but when he found out that you were a pirate, he didn't tell the other agents, because you trust him and he would never dare to set you up, so he just silently and patiently waited by the sea for the weather.

When he became a fugitive and left the agencies, he took you with him, through the doors, to finally be with you.