Dododex users say:
Noglins are tamed by trapping them and repeatedly offering healthy, freshly tamed creatures for them to control, while rotating suitable hosts to maintain progress. Once tamed, they can temporarily mind-control survivors and creatures, enabling infiltration, combat, harvesting, and disruption of enemy bases. When encountered, keep your distance because they may control you or your tames, and use flyers and secure pens when relocating them to prevent unwanted mind control.