Boomerang had been in his own little world when Meka approached him. Just as he was going to greet her, he was gently tapped on the head. This gave the canine monster a start before a smile formed on his muzzle.
He did a 360 in his stool; he tried to speak but she passed him and he turned to face her again. He leaned on the counter waiting for her to get settled. The place was rowdy and that put him on guard but a friendly face eased him quite a bit.

At her offer he nodded. Almost laughing at her flustered look. He never thought of it the way she had almost intended. "If you're treating I'll take whatever you recommend."

Lethal?! He hadn't even considered a minor thing such as this poison being lethal... Then again, it was poison all the same. He looked down at Meka, he doubted that she'd just rouse if he shook her.
He looked to Goopy, waiting for a response to Undyne's questions. He was glad someone who knew what they were doing was present. He probably would've let the slime being leave without even finding out if Meka could perish due to his negligence.

Boomer looked uncomfortable with having his paw touched, but let Meka continue to do whatever it was she was doing. Once the pain alleviated, he felt so relieved he could've kissed the boss monster. "Thank you." He wanted to say more, but noticed a rather odd look on her face.
She seemed to be out of it, as if entranced. "Meka? Are you okay?" He felt he needed to ask. She was acting wonky; her face looked abnormally blissful and her speech sounded as if she had spent to much time at a tavern, which to him would be even one drink.

Boomerang drew his paw back quickly, a slow stinging starting as the goop slipped through his fur to his skin. He tried to shake it off, but ultimately ignored it; how bad could it be?
"You weren't disturbing us," he spoke gently, though he was already thinking of a million questions to ask her. A slime type monster stole Meka's sister and one just showed up; was it mere coincidence? "I actually have a question for you... Did you happen to be around Snowdin a bit ago?" He wasn't sure how blunt he sounded. There was no telling how much of the conversation she had heard. Did she know he was trying to force her to admit to a kidnapping?

Boomerang couldn't speak. This was happening right under his nose and he knew nothing of it? He fought the urge to shake his head.
He was shaken from his thoughts when Undyne summoned her weapon. He watched it fly and turned his attention back to the warrior when she began to ask questions. Of course, he couldn't answer any of them since he and Meka had just met; he hadn't even met her sister. All he could do was simply sit back and listen to Meka's answers to the question.
He didn't feel he had to voice he was willing to help in any way possible; he had already made that promise to Meka; having Undyne help only made things easier.

Boomerang felt the water dripping onto his fur, making it heavier and heavier until it was plastered to his skin.
He looked around on their way to the head of the royal guard's abode, looking for signs of anything or anyone suspicious; he couldn't even smell a stranger in the land. He looked around sniffing still until his ears flattened from the sound of a wall shattering.
What in the Underground was that?! He had lived in Waterfall for a while, and he really should be used to random loud noises, but they still caught the canid monster off guard.
When Undyne addressed him, he simply smiled as normally as he could. "Good day, Undyne. We actually need your help... My friend here... Her sister went missing... Right out of her house..."

hope it's not to late to sign up...

Which characters you would like to participate? Boomerang
Do they have a tendency of feeling empathetic of 'wrong-doers'? yes
Are they aware of Resets or alternative Timelines? (Not AUs.) no
Do they have a connection with the Void? no
Are they scientifically minded in a brilliant or special way?no
Do they have exceptional magical abilities? yes, his magic 'lightens' his body to allow him to move faster, increasing the momentum and impact of his attacks
Are they a strategist? yes
Do they fair well in combat? yes
Are they sensitively observant of their surroundings? yes
Are they the type to help when asked for it or continue down their own path? i.e. Are they selfish? he'd help with little hesitation(couldn't yes or no with the wording, got kind of confused T^T)
If their loved ones are in danger, what is the most precious thing they're willing to give up? he'd give nearly anything, maybe his life, if someone really close to him were in severe danger
Do they have healing abilities? no
Do they have some form of relationship with Canon characters active on the forum? (Can be platonic, friendships, enemies, business or otherwise.) yes, him and Meka are friends, platonically of course
Are they easily bribed? no, but with enough persuasion he might give into temptation

Boomerang stood silently, studying the scene before him. He couldn't fathom what monster would leave slime... Well, not one that would be so devious as to kidnap another monster.
His attention turned to Meka as she addressed him. Before he could deny or confirm his help in the situation she was out the door. He turned to follow, looking back at the adult monsters for a moment. "We'll find your daughter, and I'll watch after Meka." With that said, he bolted after Meka, any sense of stealth left behind.
He easily caught up with the young goat, using a sudden burst of adrenaline to fill the gap she made. "Let's think before we rush off into the unknown... What could she have gotten into?"