I’ve always found the jōnin-leader dynamic adds a layer of institutional stress that other ‘strong mentor’ tropes often skip. In something like 'Naruto', the jōnin isn’t just a boss; they’re a living conduit between the Hokage’s authority and the clan’s internal politics. When a clan heir like Sasuke is placed on a team, the jōnin’s evaluations and reports can subtly shift the clan’s standing—favoritism or neglect gets noted. It creates this low-grade tension where the clan might try to curry favor with certain jōnin to ensure their kids get the ‘right’ team placement for prestige. You see less of the overt power plays and more of this quiet, bureaucratic influence that ends up reinforcing old hierarchies instead of breaking them.
On a character level, a jōnin’s personal bias can accidentally create new factions. If a respected leader like Kakashi clearly invests more in an outsider like Naruto over a clan prodigy, it sends ripples. It undermines the clan’s assumption that their bloodline guarantees elite mentorship. That can force clans to either double down on insular training or, in rarer cases, push their youth to seek external jōnin patrons, which gradually weakens strict clan boundaries. The fiction often uses this to show hierarchy erosion, but realistically, in a closed system, most jōnin probably just end up being another tool for the powerful clans to maintain control.