Due to his age, Martin is portrayed as a typical old Jewish man: quiet, stingy, and pragmatic. Grace says that his father is "The Buffer" that protects her from Bobbi's nitpicking. For Grace's bat mitzvah, Martin gave her a music box that plays "Hava Nagila".
Grace bitterly recalls that he hasn't noticed anything she has done since I was 12-years-old, and how he emotionally turned his back on her during college. Martin seems to enjoy retelling embarrassing stories about Grace's childhood to his friends, including the time she spilled lemonade all over her stand, and when she cooked French toast by "dumping syrup in a bag of bread" , and especially the time she let the door open and the cat got away.
He has implied serving in the Korean War and sleeping in a foxhole he claims is more comfortable than sleeping beside his wife.
- It is implied that Grace is not his favorite child.
- He seems to have a flirtatious relationship with Karen, as she once called him "big daddy" while on the phone, and stated that she has stripped for him.