Bunger is the fourth son of Keitel and lives in the green living room. Bunger is a coward, when the protagonist sees Bunger; he tells them that he wants to race like his GT-R brothers and doesn't like being alone while driving when the protagonist agree to him on being your team-mate, Bunger is not scared anymore.
- "Yikes!! Who are you!? Don't come into my house like that! You scared me! Please knock next time! Hee hee hee hee hee!"
- (After the protagonist learn about Keitel's safe) "Yikes! You scared me! I get scared easily. Please come in more slowly. What? How to open the safe? I don't know. Is that important? Dad wouldn't tell me, because I'm the youngest. Sorry, I couldn't help you much. Hee hee hee hee hee."
- (Before recruiting him) "Yikes!! Who are you!? Don't come in my house like that! You scared me! Hey, listen to me. I want to race on a team like my brothers. Do you want to add me to your team?"
- (Declining his request) "Oh... well, it's all right."
- (Accepting his request) "Yahoo! Thanks! Hee hee hee! I'll do my very best."
- (Whilst on the team) "Hey! I'm not scared anymore. Let's win the next race too!"
- During conversations with any of Keitel's sons, you can see the portraits with numbers of fish meaning that there is a code linking to Keitel's safe. The number of green fish on Bunger's portrait is 1.