could there be an NPC type, or types, that, when link gets close to it, it flies away? like, it walks around normally, using it's own tiles, and when link gets close, it flies in the opposite direction that Link is moving? there could be 7 types, fly left, right, north, south, right/left, northsouth, and opposite. each one should be obvious as to what it would do

the only think I can think of that would make this hard, is the trigger for making them fly away