Of course Frisk had no clue how they would be able to get away from everyone without anyone noticing. After Undyne made sure everything was safe on ahead Toriel went to the front of the group leaving Frisk in the back. After making their way to the throne room itself Frisk glanced around the room to see if Flowey was there. There were students all over place, some standing on the flowers. With them there Frisk couldn't see Flowey.
Frisk had to wait and check if he was there after everyone moved onto the next room. Toriel of course was lecturing everyone about all of the significant things that happened in the throne room she made as her time as queen. She of course left out the part where Asgore declared war on humanity. Humans and monster were getting along very well with each at this point. Knowing that might cause problems for humans and monsters.
While everyone went on ahead to the capitol Frisk waited in the throne room. Luckily enough for them no one noticed that they had stayed behind. They could look for Flowey without anyone noticing them. Frisk didn't have much time to look before somebody noticed they were gone. Toriel would have went back to Frisk after she was done lecturing. Since they were not there Toriel would notice sooner rather than later.
Frisk knew that Flowey has been in the throne room and had only hoped that one of the golden flowers could be him. They couldn't call out his name, that would let everyone know that they were in fact behind the rest of the group. So they had instead to look at each individual Flower and one was him. If Flowey was there he would have had to avoid everyone stepping on him. Frisk, even though they knew he probably wasn't there, decided to look anyway.
Frisk skimmed through the flowers. Carefully they combed through the flowers, but none of them turned out to be Flowey. Frisk realized that they would have to look in the Ruins, but how would they manage to get there? Undyne made it clear that the students were not visiting the Ruins. Frisk did know how to get there, but they didn't know how they would get past the group. They knew they would be stopped from going into the Ruins if they were with everyone, especially with Toriel there.
"WHERE IS FRISK AT" Papyrus said in the distance.
"They're here" Undyne reassured "somewhere anyway."
"I DO NOT SEE THEM" Papyrus said sounding slightly worried.
"Alright, calm down" Undyne said.
Frisk didn't have much time to think. They couldn't be found out. They really did want to find Flowey. They quickly looked around the throne room for a place to hide. Noticing the throne in the corner with the sheet over it, they decided to hide there.
"Frisk please come forward" Undyne said. There was nothing, but silence. "Frisk? The human child Frisk please come out now, so Papyrus doesn't start panicking and crying again."
Silence still.
"Undyne" Toriel said, her voice shaking "Where could possibly be?"
"THIS ISN'T MY FAULT" Papyrus said "THE HUMAN CHILD IS NOT GONE BEAUSE OF ME."
"PAPYRUS that is not helping!" Undyne screamed at him.
"He's right" Toriel said starting to sob "I should have been with them the entire time."
"WAIT NO" Papyrus said trying to make Toriel feel better "THIS IS MY FAULT. PLEASE DO NOT CRY YOUR HIGHNESS."
"Alright nobody panic!" Undyne said trying to make everyone calm down
"WHY NOT" Papyrus screamed "THIS IS THE PERFECT TIME TO PANIC"
"PAPYRUS you're not helping" Undyne said "Frisk has their cell phone right Toriel?"
Frisk, hiding under the throne, quickly got out their phone and turned the volume completely off before Toriel could even answer yes. Undyne dialed Frisk's number on her phone. Frisk felt really bad about making everyone worry about them. They really hated to hear Toriel like that, but finding Flowey was very important to them. They wondered if it was selfish of them.
Undyne called Frisk's phone in the capitol. No one answered. She headed back to the throne room to see if they were there. She called again, but Frisk refused to answer her. Undyne called again when she looked for them at the entrance. After failing to get a hold of Frisk she went back to the group.
"CAN WE PANIC NOW?" Papyrus asked.
"Now seems like the perfect time to" Undyne said just about to freak out "but don't anyway. We should get the rest of the students home. Papyrus you and Toriel take them back and get help I'll look for them myself. I can handle myself. And go the Alphys. Maybe she can track their phone."
"Where are you going to look?" Toriel asked sounding very concerned "They could not have gotten that far could they?"
"I don't know" Undyne said to Toriel "but I will search the underground top to bottom. No rock will be left unturned. I will find them. I promise."
Toriel reluctantly left with Papyrus. It was her job as a teacher to make sure all her students make it home safely from the field trip. She and Papyrus took role made sure everyone was there before they boarded the bus home and left. Toriel tried her hardest not to break down crying. Frisk was pained to hear her like that and had to keep themselves from crying out to her. They so badly wanted to cry out to her "I'm right here mom, don't worry.", but couldn't.
On the way out Undyne made sure no one else was left behind. Then she went back to the entrance to let Toriel and Papyrus know that no one else was there. That entire time she, nor anyone else thought to look under the covered throne.
"Alright Papyrus" Undyne said "don't forget what I said to you."
"DO NOT PANIC" Papyrus said feeling confident.
"NO!" Undyne screamed "Well…yes, but what else."
"THAT YOU'RE LOOKING FOR FRISK YOURSELF" Papyrus said. Undyne looked upset with him and quickly he replied "TO GO TO ALPHYS AND ASK IF SHE CAN TRACK FRISK'S PHONE."
"Yes" Undyne said then turned to Toriel "don't worry I'll make sure Frisk returns safely."
"Thanks Undyne" Toriel said softly. She left to bring all her students home.
When everyone was at the entrance Frisk came out of hiding and quickly made their way from the throne room to the capitol to the elevator down to the Hotlands. Thankfully they got down without Undyne noticing them. It was exciting for them. They were going to see Flowey again.
