I experimented with that dragon somewhat, and it looks like he targets someone, and then continuously tries to path his way to them to consume them, and only them, unless distracted by noise or getting alerted by your presence. I don’t know what the exact targeting rules are, but it always appears to target someone that is close by, so if you’re stalking him he likely will target you eventually, especially since every NPC that’s gobbled up increases your chance of getting picked next.