(don't mind the roughdraft doodle up above. just showin what the eye looks like~)

Chara and Asriel would be floating around, following Frisk, as they walked to a certain sentry post by the ruins.
"hey, haven't you ever noticed?" Chara started, causing the two others to turn to her curiously.
'noticed what?' Frisk signed as they held a small bag with their arm.
"Ender, he isn't like the others here at all- and he's actually good with an instrument unlike some monsters here..." Chara trailed off with a playful smirk at Asriel who pouted in response.
'Chara, please be nice to Asriel. Also, what do you mean by that?' Frisk questioned as Asriel nodded in response.
"C'mon, haven't you noticed how he is? He's off with everyone, even Papyrus! He has this weird aura that surrounds him constantly, and he also meets this weird skeleton with a paintbrush that most certainly is way too big," Chara pointed out before crossing her arms.
"I-I mean, I see you're point C-Chara... But maybe that's just how he is?-"
"How who is, kiddo?" a certain voice asked from behind them which caused the three to freeze up.
"Geez, I'm just kiddin kiddo- no need to get all frozen on me~" Ender joked with a wink causing Chara to groan, Asriel to facepalm, and Frisk to muffle a laugh.

"So, what'cha three doin out here?" Ender asked curiously, before giving Frisk a confused look as they handed him the small brown bag, "for me?" he questioned as Frisk nodded happily.
"Aw, thanks kiddo~" Ender smiled as he ruffled their hair.

PotatoNoobie

"Hello,Everyone!! How are you doing so far,If i kindly ask ^^?"

A surprised noise left Asriel as Chara looked around confused. Frisk warily glanced at the two before looking up at Ender who patted their head lightly, "Don't worry, kiddo. It's just one of the creators." Ender mused as the three calmed down...well, two of the three fully anyway.
"Hello creator, I'm well thank you for asking," Ender spoke with a hidden smile.
'I'm good! How're you?' Frisk signed happily.
"O-Oh, um, I-I'm okay! Thank you..." Asriel smiled a bit embarrassed before he looked over at the grinning Chara.
"Heya! I'm good! And I hope you people are too!"

"With that said, go ahead and continue, creator," Ender mused.

PotatoNoobie

"So,Just random things- 1. Chara,Have you ever pranked Ender,Or even asriel? if so,What kind of prank did you do and how did it went? 2. Ender,I dare you to tickle Frisk,If you could 3. Asriel,I dare you to Tickle Chara >:3"

Chara grinned, a grin to which caused worry to spread across all of the others faces.
"pfft- of course I have! There was this one time, with Ender, where I gave him a chocolate bar- oh and he can't stand spicy things by the way, and when he ate it he had the spiciest chocolate made by Grilby- Hah! It was pretty fun!~ And with Azzy, of course I prank him! One time, it was during Halloween, we had set up the ruins as a haunted maze- Ooooh it was soo cool!" she grinned, her eyes shining with pure amusement, " I led Azzy into the maze and well, to put it bluntly, he was even jumpier when we left~" Chara snickered as Asriel playfully hit her arm lightly.
"Chara..."
"What?" the two smiled happily at eachother.
"Hey, Asriel, c'mere kid." Ender chuckled as he led Asriel a little bit away from Frisk and Chara before telling him the dare.
"O-Ooh~" Asriel smiled.
"Ready?" Ender smirked which the prince nodded to eagerly.
"Hey, Frisk! Chara! Come over here!" Ender called out to them.
"what's up?" Chara asked confused as she and Frisk came over, only for the ghost to yelp as she was tackled by the goat bro, and Frisk to let out a surprised noise as she was picked up off the ground.
the two were then tickled, because yes.

(around 10 minutes later)

the two humans attempted to catch their breathes as Asriel and Ender proceeded to stifle their own laughs.
Chara was first to recover, an 'evil' glint in her eyes as Asriel...paled? Um, he just looked worried let's leave it at that.
"o-oh no..." Asriel yelped as Chara grabbed ahold of him, keeping the goat bro in a ghosty armlock.
"Give in Azzy~ there's no escape~" she grinned as the Asriel squirmed in her grasp...at least, until;

Hyksos2001

"(A glitched version of Asriel appears, his eyes are green, and his color is partially black and partially white, he doesn't seem happy as his eyes start glitching between green and red)

???: You don't seem to be nice to him, Chara, so, let me try telling you in a way you would understand, be nice to your brother, or else I will make sure you feel pain in ways not even you can imagine, don't you dare try thinking I'm unable to harm you just because you're a ghost!

Woah, calm down, Astrial, we won't hurt anyone right now

Astrial: Fine, but if Chara causes more trouble, I'll make sure she suffers like my Chara did, and I enjoyed it a lot (Astrial has an insane grin on his face as his eyes go back to green)"

Chara frowned a bit and released Asriel.
 Ender, however, then stepped before Chara and ruffled her hair, "Listen..uh, creator," Ender murmured before his eye flashed a deep red, a purple 'X' over the glowing red pupil, "If your...friend there, ever threaten the kid again. Well... I dOn'T tHiNk ThEy'Ll Be DoInG sO aNyMoRe..~" Ender grinned as a dark aura surrounds him, his voice surprisingly sounding glitched suddenly as he spoke.
closing his eyes and sighing silently, the skeleton's eyes turned normal once more as he smiled kindly down at them, "don't be scared, kiddos. I was just kidding, I won't hurt anyone~"
Frisk nodded nervously causing Ender to sigh quietly, "come, let's go get some nice-cream. What do you guys think of that eh?" he ruffled Frisk's hair and smiled at the other two. Once everyone agreed, all four of them left to the nice-cream stand.

--------------------------------------------------------------

Well dang, that was something.
Anywho, hope you guys enjoyed! and shoutout to the two people who asked and dared stuff in this book too!

-Sheikah