One of my secondary characters is going to play an important part, more important than at present, in the story.
Is it OK to introduce him, make the reader love him, and then leave him behind til a much later appearance? Just sort of drop him off the plot and leave him simmering?
The character plays an important role at the beginning of the story and even if he has responsibilities and a plan of his own, is willing to sacrifice those plans to save the heroes. He ends up not having to sacrifice much, and is still able, while helping the heroes, to go do his thing.