Mark Kobayashi was a character mentioned originally in Gabriel Knight: Sins of the Fathers, and off-handedly referenced in Gabriel Knight 2, see Mark Kobayashi. His history is slightly different in the novel.
Mark was a Japanese boy that Grace's mom wanted her daughter to date and marry.
He later got engaged, to someone else. Her mom thought she was ruining her own life, by having turned down Mark in the first place. Grace of course didn't care that he got engaged. His mom liked, him, she didn't.
- ↑ GK2 novel, pg53: ""Mom, I'm not ruining my life, and I don't care if Mark Kobayashi's gotten engaged—you liked him, not me." "