The graphics in the series have come a long way from the original sprite characters in the first two games. Given that Suikoden Tierkreis is a DS game, the graphics aren't going to be as good as the last releases that were for the PS2. But the graphics are on par with the newest DS games that I've played recently. There is quite a variety of characters. I was impressed with how many different looks they came up with for the characters from different places. Not that they haven't in the previous games, but they seemed even more varied in this one.
The music is very reminiscent of the previous Suikoden games. I'm not 100% sure that the background music is the exact same as one of them, but it's so familiar that I believe it is. The music does change throughout the game depending on where you are and what battles you are in. I do like the battle sound effects. It's just a nice bonus to have different effects for a sword slash, an arrow attack, a magic attack, etc. The one thing I do have a complaint about is the characters' speech. During the action cutscenes, everything sounds fine. But when they are standing around talking, quite a bit of the time some of the characters are speaking way too fast. So fast sometimes that it is hard to understand them without the text below. Granted, it's not all the time though. The hero is the worst about it.