Part 2 of 2
You and Batman track down and face off against the arsonist that has targeted Poison Ivy.

You scanned the abandoned fireworks factory, noting it's weak infrastructure and still operating electricity.

You: By what you told me, this place has been abandoned for years. It shouldn't be on the city electrical grid.

Batman: Exactly, that with the various shipments of the bombs you mentioned narrows down this factory as his hideout.

You: You know this guy?

Batman: A regular nuisance. He's a textbook pyromaniac who believes that he can receive supernatural messages in fire. Over ninety percent of his body is covered in burns.

You: Sounds like a regular nutcase.

Batman: An Arkham regular. Now small talk aside, we only have a small window before he takes off to finish Ivy, and he's more than likely trapped the building. So we'll need to move quick and careful.

You: Quick and careful is what I do best.

Batman: Then why did you bring a rocket launcher?

You looked at the rocket launcher on your back.

You: You never know when you might need one.

Batman looked at you with disapproval.

Batman: Don't blow this.

You groaned in annoyance.

You: Alright dad. Let's go!

You both approached the factory, and upon cautiously entering, noticed that the equipment in the factory was recently used.

You: This guy has been using the equipment in this factory to improve the fire bomb, he should be able to level a building with one now.

Batman: He's willing to destroy the police department to get to Ivy. But why so obsessed?

You: Knowing Ivy, it's probably a vexed lover.

Batman: It couldn't be, our suspect only cares about fire.

You: That leaves motive up in the air.

Batman: Motive is unimportant at the moment, we can understand his reason for wanting Ivy dead after we bring him in.

You both investigated further, and noticed a light on in an upstairs office, along with the sounds of a welder.

You looked at Batman, who signed you to approach quietly, where you silently climbed up to the office.

You unholstered your pistol, and kicked in the office door, prepared to fire at the suspect...

But found no one inside.

You leaned out the kicked in door to call for Batman.

Batman: He's not here! He must have ditched!

You looked back in the office, and heard a faint ticking.

Your instincts kicked in, and you quickly jumped off the second floor just as an explosive blast erupted from the office.

You rolled on the ground upon impact, where Batman rushed to you to ensure your safety.

Batman: Are you alright?

You: Yeah, the blast burnt my jacket, but nothing else.

You both heard the sound of a jet engine, and looked up to see a fast approaching, flying figure.

The figure came into view.

Firefly

Firefly: Well look here, two pieces of meat to fry up!

Firefly spoke with a raspy voice, a clear indicator of his burnt body.

You: God! You look like a raisin!

Batman steeped forward.

Batman: Leaving a predictable trail as always, Firefly. Tell me, what's your grudge against Ivy?

Firefly: That little weed double crossed me on a job in Gotham bank! She took the loot and I rotted in Arkham! I broke out and tracked her to the greenhouse she held up in, and burnt it to the ground! The stupid leaf has managed to slip through my fingers, but not after tonight! I'll burn her, you, the cops, and that stupid new guy with you!

You crossed your arms in offense.

You: Hello? I'm right here, and I can hear you.

Firefly: You were supposed too! Just like you are supposed to fry!

Firefly fired his flamethrower at you, with you and Batman narrowly dodging the fire.

You took cover, and nimbly climbed a beam to take aim at Firefly's backpack, which you shot at, releasing a stream of fire from it.

Firefly: You idiot! You ruptured the main gas valve! My jet pack will go off and kill us all!

You: I beg to differ.

You jumped onto Firefly, manipulating the wings of his jet pack to get him to fly out through the factory's skylight.

You began to pull Firefly's jet pack from his back, and managed to tear it off of him, sending you both plummeting to the ground while the jet pack continued up and exploded, illuminating the night sky.

Firefly: No! NO!!!

You dived down after Firefly, catching him and knocking him out with a swift punch, and activated the parachute you keep in your armor.

You carried Firefly as you both gently descended to the ground, Batman meeting you with the Batmobile.

Batman: So much for quiet and careful.

You: It went fine.

Batman: Oh really?

You looked at the factory which was now on fire and collapsing.

You: Okay...could have gone better.

You threw Firefly into the trunk of the Batmobile.

You: All this over money?

Batman: Firefly is unhinged, even a slight inconvenience can set him off. But now he's captured, and will be put in a special cell in Arkham.

You: And Ivy?

Batman: She'll be put in Arkham as well, but will be under protective watch.

You: Good.

Batman: Good? What did I tell you about catching feelings?

You: it's not like that, she needed help and I helped her.

Batman: Font let it go past that, you'll regret it.

You both entered the Batmobile and left the flaming rubble that was once the fireworks factory behind.

Timeskip, Arkham Asylum Garden
You were pushing Ivy in a wheelchair as she admired the various flowers in garden.

Ivy's burns had mostly healed, but the doctors recommended she stay off her feet for a few more days to avoid injury.

You managed to earn good grace with the Arkham staff upon bringing Firefly in, and they allowed you visitation with Ivy upon you asking.

Ivy noticed a flower, and caught your attention.

Ivy: Do you think you could carry me down and look at that one?

You: Sure, just let me know if you start hurting.

You picked Ivy up in your arms and kneeled down so she could look at the flower.

Ivy: This flower has a legend that says whenever two people find it, it means a romance would soon blossom.

You: Sounds a bit crazy to me.

Ivy held your face in her hand.

Ivy: Aren't we all?

Ivy rested on your chest as you sat on the ground.

Ivy: Thank you for saving me, (H/N)...

Ivy yawned.

Ivy: Let's rest here awhile...and enjoy each other's company.

Ivy nodded off in your arms as you petted her hair.