Gendan is more interested in the man than his toys. She will continue to Search for the man. (Perhaps with Hunin's Help?) "Help me look for the runner!?"
Perception 15 If Hunin helps:

Hunin will you help?

Meanwhile, Val hears some chaos around the new guard post.

Hunin would cast the cantrip Ray of Frost on the firework to prevent it from going up too high.

Ray of Frost :  7 Damage: 6

Then would proceed to help Gendan.

(ZulkRS you can allow or not allow based on timing. If the spell would be too much I will stick with helping Gendan)

Actually I'll allow both. However since, it's moving fast toward the sky, I'm assuming it's AC should be 14. I'm assuming you open fire as soon as you see it launch and then you prestidigitation to remove smoke close to the ground and then you help Gendan. I will allow it. However you miss the fire work.

You help Gendan look and at one point, Gendan notices footprints on the ground thanks to you. Then she finds the guy in a bush.

"You, why did you run!?" She moves within 5 ft of the man so as to provoke an opportunity attack if he were to attempt to flee. "I'm giving you a chance to talk when I feel just as inclined to run you through with my sword." 

If Intimidation is needed: 

The man looks around and looks up at the rocket before looking back to Gendan and her sword. He kicks some dirt into her face (Disengage) and starts running deeper into the forest. This time however, he doesn't go outside of Gendan's darkvision. He draws a dagger and gets ready for an incoming attack. He decided he's going to take his chances (Intimidation roll too low)

(Okay, where are we with initiative then? It's unfortunate for his sake that I rolled a low intimidation.)

Oh right. With 3 people, the initiative is:

Dark head (He already took his turn this round)
Gendan (Your turn)
Hunin (Your turn too. I do group initiative most of the time)

(I assume Gendan can reach him without a Dash, since he didn't Dash, and we seemed to be matching pace earlier.)
Gendan runs up to him and swings her longsword with Booming Blade "You should have just talked."
Attack: 22 Damage 6 slashing + 6 thunder if he willingly moves before Gendan's next turn.

He hears a low hum surrounding him.

Gendan, you still have your Hex on him. Do you wish to do additional damage?

(Hunin's turn)

Oh yeah: Necrotic damage from Hex: 3

The man doesn't look like he can last very long. As he wobbles, he seems to be more focused on something else rather than the winning the fight.

Hunin's turn.

Hunin will run to catch up while doing so will whisper his incantation to his orb to cast Sleep on the man 

Sleep : 13

The man wobbles more before collapsing.

Gendan will tie him up with her rope. "I guess we should turn him over to Vladimir, huh? Let's meet back up with Folki and Skriiod first. I assume they took care of that owlbear."

Quote from ZulkRS >>

Val, you notice this weird smoke trail from your tree.

Quote from ZulkRS >>

Meanwhile, Val hears some chaos around the new guard post.

 Waiting for Val to react to these.

The difference between the two incidents is 3 minutes.

(Missed the smoke one) 

As Val smells the smoke he descends to check the source of it. 

When he hears the conmotion he will walk over the guard post. But it will depend on what happened with the fire. He will try to stop the fire from spreading in the forest and into the village before going to check the guard post.

Val, as you go to the smoke and ignore the guard station, you notice there's no fire. It seemed like there was a fire from your tree but you see there are none when you get to the forest. You do meet Gendan and Hunin. You see the dark masked guy asleep and tied up and almost dead (He has 2 HP remaining). Skiirod and Folki also meet up with you.