Friendship, favours and knacks
Talk, give gifts, do favours and go places together, and residents become friends who teach you knacks and help out.
Friendship grows through talks, gifts, favours and outings together, from Just met all the way to Partners: romance is possible.
Each day residents ask 2 favours, each due within 2 days. Trading with a resident needs no asking: pick one of the three things they've brought, and they'll tell you if it's a fair swap.
Knacks
A friend at 25 friendship teaches you a knack: Glide, Mist, Glow, Burrow or Mimic. Mimic (M on a keyboard, Y on a gamepad) is how you hide in Hoverfly.
Shifts
Friends can take a shift and fetch things for you while you're away.