Chapter Seven makes it clear that the arrival of Ikemefuna into Okonkwo's household has been very positive for Nwoye. At the beginning of the novel, Nwoye is depicted as a rather feminine young boy who shames his father and spends more time with his mother. This all changes with the influence of Ikemefuna, who comes to be like an older brother for Nwoye, as this following quote reveals:
He was like an elder brother to Nwoye, and from the very first seemed to have kindled a new fire in the younger boy. He made him feel grown-up; and they no longer spent the evenings in his mother's hut while she cooked, but now sat with Okonkwo in his obi, or watched him as he tapped his palm tree for the evening wine. Nothing pleased Nwoye now more than to be sent for by his mother or another of his father's wives to do one of those difficult and masculine tasks in the home, like splitting wood, or pounding food.
Whereas Nwoye before was presented as rather a weak young man, choosing to avoid his father as much as possible and not asserting himself, the presence of Ikemefuna in the family seems to "kindle" something within him that helps him to grow up and mature and to embrace his masculinity in a way that he wasn't willing to do before. Ikemefuna acts as a kind of role model, and as a result, Nwoye spends more time with his father and begins to take on more "manly" tasks. Okonkwo is therefore delighted about the influence of Ikemefuna on his son.