Frisk almost immediately throws themself over Asriel to shield him from danger, and looks back up at Tron with a look of faint confusion. With his mask on they can't recognize him, but the voice is familiar--they just can't place from where.

Before Frisk can even protest Asriel's worries the area shifts around them, and Frisk holds onto their brother all the tighter, looking around for any traps or puzzles...but there's nothing. Nothing but the very familiar figure walking toward the three rescuers with violent intent. When Rinzler's disks hum to life, Frisk's soul starts beating frantically within their chest. They have a very, very bad feeling about this.

"Rinzler!"