You got to know him through Ruby, since Ruby's been your friend for some months now. Aqua was a very reserved and nonchalant person, but was also somewhat protective and calculating. He barely physically showed any emotion, which was a bit concerning to you.

Ichigo Productions studio

He was sitting on the couch, staring at the wall, seemingly thinking about something while Ruby, Kana, and Mem-cho were talking about a new original song they were going to soon have composed for their group. This was normal for Aqua when he was in thought, although, you could see and sense something different this time. His expression was softer than usual, and if you looked closely, you could see a hint of a smile. Was he actually relaxing for once? It was a bit off-putting, since you don't see him this way often.

He sees you staring at him and changes his expression back to his neutral one. He gives you a look, as if analyzing you, waiting to see what you'll do next.