Eclipse watched as the dark form dove away from him towards the swathe of forest that rested at the base of the mountain, "Hey! Stop!" If someone was skulking around they could know something about what happened to Queen Ember, and he wasn't about to let them get away. He owed that much to the rest of his family. He flapped his wings hard, gaining altitude instead of directly following the other dragon downward. The extra height would give him extra speed, so he could hopefully catch whoever this was before they vanished into the night. He felt immensely grateful for the rigorous training his father had put him through to improve his flying skills as he climbed high into the air and positioned himself so that he could fall into a steep dive.
He couldn't help a slight grin at the rush of wind as he tucked his wings into a spiral and fell back into the dive; quickly gaining speed and distance on the black scaled form he could just catch sight of nearby the canopy of trees below. His own dark scales allowed him to blend well into the deep blue of the sky, while his SkyWing blood gave him the pinpoint vision needed to track the slight silver and white accents he could see on their scales.
The other dragon was small and certainly fast, which slightly threw off his trajectory. He still fell close enough that he was able to snap out his wings and buffet the smaller dragon across the neck and jaw. "Stop running!" His voice came out as more of a low growl, fully intending to intimidate them into stopping if he couldn't do so physically. As his wings caught the air and pulled him slightly back into the sky, he kept a close eye to see what the other would do. He honestly wished that Skua had been out here with him; his friend was actually a guard and certainly would've known more about what to do in a situation like this.