That kanji symbol there is read as "nii", as in "兄さん", or as in "NIISAAAAAAAAAAAAAN".
I drew this in class, then coloured certain areas in Photostudio this evening.
Ryu was a character I didn't ever pay much attention to, until the fall of 2009 or so when I started showing Tetsujin to ~Zaika-Purr, whom liked him. And you know, I would've killed to see more of the Murasame Brothers pulling heists! All the cool guest characters drop out too suddenly in the show...