Jace Rusewicz is one of the pre-made NPC Science Hobby instructors who comes from Hobbies, the secret sub-neighborhood introduced with The Sims 2: FreeTime. The other two science hobby instructors are Johnson Fleig and Nerissa Inada. He appears in every neighborhood once FreeTime has been installed. Jace can be made playable by befriending and asking him to move in, or by marrying him. He has short brown hair, dark blue eyes, and light skin. Jace is a Knowledge Sim with the Pisces zodiac sign.
As far as personality, he is quite active and nice, and a little bit neat. But Jace is quite shy and serious. He is mostly interested in Environment, Food, Weather, and Fashion. Jace has the same facial structure as Shea Johnston. His pre-destined hobby is Cuisine. Even though his default head-shot depicts him having short hair, and red and brown overalls, when Jace is first spawned in-game, he will have medium-length electrocuted hair. He will also wear a Mad Scientist outfit. However Jace will still retain the hairstyle in his default thumbnail, for most outfits besides everyday.