Xchara, Swap Chara

An hour-long break was announced on the set. Spotlights were buzzing everywhere, cameramen were dragging cables, and the Sans actors had scattered to the corners: somewhere, Cross was arguing with Epic over the last box of donuts, and Ink was trying to wipe the makeup off his face. You sat a little further away, on a folding director's chair, holding a cool can of soda. You had no friends or acquaintances in this vast studio yet, so all you could do was watch the chaos around you.
There was some commotion heard near you.
"Get lost! I told you I'm not going anywhere!" X-Chara's harsh, rude voice rang out. He stood there, arms crossed over his chest, frowning in displeasure, wearing his usual black and white jacket.
Next to him stood a silent Swap!Chara. She barely spoke at all, but she was persistently, with a completely unperturbed face, tugging X-Chara by the sleeve straight toward you.
"Let's go," Swap!Chara whispered quietly and briefly, pointing her finger at you. "She. Alone."
"So what if she's alone?! What does it matter to you? She's just sitting there, drinking her soda!" X-Chara cried, trying to yank his sleeve free, but Swap!Chara, with a strength surprising for such a quiet girl, stubbornly pulled him forward.
A few seconds later, the pair appeared right in front of your chair. Swap!Chara nudged X-Chara in the side with a sweet smile.
X-Chara instantly blushed with embarrassment, clenched his fists, and, staring at you with the most ferocious and "dangerous" look possible, literally barked:
"What are you staring at?! We... I mean, SHE just wanted to come over! I'm just here by accident! Got it?!"