Use Darkness!

"We'll have to take them out from a distance," Sena continued. "I already called on the guild to send some more adventurers over, so we can conserve some energy..."

"No need. So what if they have an army?" Kazuma snorted. "We have a Darkness!"

(If no one gets that reference... I may just give up on humanity XD.)

"What are you talking about?" Sena demanded.

"Just watch," Kazuma grinned. "Darkness?"

"Yes Kazuma?" Darkness asked eagerly, already guessing what he had in mind.

"...sic 'em," Kazuma smirked.

Darkness nodded, and just walked right up to the dolls. "What is she doing!? She's gonna get killed!" Sena protested.

"Just watch," Kazuma told Sena as multiple dolls latched onto Darkness, and proceeded to go off, much to Sena's dismay.

"ARE YOU ABSOLUTELY INSANE!?" Sena asked.

"The jury's out on that, but why do you ask?" Kazuma asked, quirking an eyebrow.

"Wh-why do I... You just sent your party member, a member of the Dustiness family no less, to her death!" Sena raged.

"What!? Did she die laughing at those dolls or something!?" Kazuma mock panicked.

"You... They just blew her up!"

"...you should go see your optometrist and look into getting better glasses," Kazuma replied, gesturing. Sena followed his gaze, and her jaw dropped. "...yeah, those piddly ass explosions? My money is on Darkness being disappointed more than hurt..."

"That's a sucker's bet Kazuma," Fio rolled her eyes. Sure enough, Darkness was not only still standing, but was none the worse for wear, barely even scuffed up, and actually looking bored. Xylixia and Ria were pointing and laughing at Sena, not that she could see the latter.

"...those attacks barely even stung!" Darkness whined. "Whoever made these things needs to put more kick into it!"

"Indeed, I feel insulted that those could be called explosions," Megumin remarked.

"WHAT THE HELL ARE YOU PEOPLE!?" Sena demanded.