Character
Macintosh System 2 looks a bit like Macintosh System 1 and Macintosh System 3 in terms of eye color and hair color. System 2 wears a light grey t-shirt with two pockets, black pants, a white belt in the style of the bar for open windows, a dark grey bowtie with white dots and a black Apple logo on it, and black shoes.
Compared to Prima and Saburo Fuji is more shy and awkward although he does have his own qualities such as being faster, making lists and new folders, could sleep properly unlike Prima and has a turret as his weapon. Despite these he still manages to end up as being one of the lesser known between the three of them.
Oh, and he likes to test things for his friends and diagnosing issues.
Family and Relationships
Macintosh System 1 & 3
Fuji is part of the triplets with Prima who is more energetic and Saburo who is sometimes more formal compared to Fuji who is passive so he is prone to being dragged into Prima's schemes, but Fuji is always willing to help out, even if he doesn't always understand what he's getting into.
Apple Lisa & XENIX
The son of Lisa-tan, the two of them get along but the developers attempted to convince him that he and his sister were much better than their own mother. The developers felt that Fuji and his sister were a better representation of the future of computing, trying to distance them from Lisa's legacy. Since Lisa was friends with XENIX-tan he got to meet her too.
Windows 1.0
He and Wilma never got along at first as Wilma could not compete with Prima and Fuji. However they became friendly to each other after Fuji defended her from Prima's rudeness towards her as Prima felt that Wilma was a threat to her faction, and she was not afraid to show it. Fuji was appalled by Prima's behavior towards her. Fuji's defense of Wilma made her realise that he was not the arrogant and dismissive person she thought he was. She began to see him as a kind and supportive friend, and they started to get along better.
XEROX Alto
Fuji and Xerox Alto-kun have a complicated relationship. Alto is the father of System 2, but he left Lisa when System 2 and System 1 were young. As a result, System 2 doesn't know much about him and hardly ever sees him. The only time System 2 got to know his father was when Alto tried to sue Lisa for custody of System 2 and his sister. In the end, Lisa won custody, and Alto was ordered to pay child support.
Abilities
Fuji wields a turret styled after the trash can in the classic mac versions. The turret not only shoots floppy disks but a large laser beam that has to be recharged.