These people are just kind of there in Harvest Moon 64. They won't become your in-laws and you can't marry them but you will be able to see events with them and do some favors.
1. Barley- Works at Chinese restaurant
2. Barleys Wife- Also works there
3. Carpenters- Workers that work on your house
4. Dad- He is your father, you see him at the beginning of the game and the third summer when he visits to rate your progress
5. Duke- Bartender at the bar
6. Goddess/Imp- both live in water and will grant you gifts/wishes
7. Greg- Fisherman, gives you fishing rod
8. Head Carpenter- You go to him to buy extensions
9. Judge- He judges the cows and vegetables
10. Kent- Grandson of Potion shop owner brown hair wants to own a farm
11. Louis- He is the guy you will see in the blue mist butterfly scene that takes your picture, he also might be walking around
12. May- She is the little girl with brown hair that lives with the midwife
13. Midwife- Helps your wife give birth
14. Pastor Brown- He runs the church
15. Photographer- He takes your pictures
16. Potion Shop Owner- Sells you various medicines, also Stu and kents grandfather
17. Random Couples- You will see a kissing couple and old couple at random at times
18. Rick- An inventor, who is also Ann and gray's cousin. You can buy things from his shop 4 days a week such as draws, rugs, and the blue feather
19. Sabiara- He owns the souvenir shop next to Rick. He only sells a couple things like the ocarina.
20. Sammy- He sells you things. Be careful what you buy.
21. Sprites- Befriend them to unlock extra scenes and they may feed your animals
22. Stu- Grandson of Potion shop owner, black hair
23. Three girls- You see them at the horse and dog races, but never around town
24. Zack- He's the shipper that comes to your house