The Price family makes its home in the village of Kilanga for over a year. While the previous mission man, Brother Fowles, was a total BFF to Kilanga's residents, Nathan's forceful attitude keeps his family from getting too close to anybody in Kilanga. Still, they manage to make a few friends during their stay in the village:
Of course, the Prices also make a few enemies while they're in town. Tata Ndu, the chief, while not exactly an enemy, wouldn't be heartbroken to see the Price family leave sooner rather than later. Nathan encroaches on his territory, and Nathan's version of Christianity causes more harm to the village than good. Plus, they refuse his offer to buy Rachel and insult his family at the hunt. He sees them as liabilities, not assets to the village.
But then there's Tata Kuvudundu, whom Nathan calls a "witch doctor" even though the Congolese word for "witch doctor" and "preacher" are one in the same. Now, he really is an enemy to the Prices: he's the one who puts the snake that killed Ruth May in the chicken coop.
Leah later hears that the people of Kilanga ran Kuvudundu out of town. The villagers may have found the Price family irritating and baffling, but they sure didn't want them dead.
And then there are the kiddies. Leah makes friends with Pascal; although we don't see too much of their relationship, it must have been pretty important: Leah names her first son after him.
The most important influence on their life is Nelson. An orphan like Pascal, Nelson is sent by Anatole to replace Mama Tataba. He's super patient when dealing with the Price family. That, plus his intelligence ("In the Congo [...] even somebody as smart as Nelson isn't allowed to go to college, any more than us Price girls are" (2.5.3)) makes him an invaluable addition to the house.
He teaches the family about supernatural Congolese customs (owls eat souls, and don't say "snake" at night); non-supernatural Congolese customs (like when Tata Ndu won't stop giving them stuff and he's the only one who realized that Tata Ndu has his eye on Rachel); and he gives Ruth May the nkisi.
When Brother Fowles says, "You do not support the root, the root supports you" (3.8.52), he means the people of Kilanga. Despite what Nathan thinks when he's stomping around hacking off branches, the people of Kilanga are supporting his family—and not the other way around.