POV Asriel
After they have died in the throne room and toriel moved Chara's body a flower started moving, after some time the former entity started learning of the power of determination allowing him to do many things but after getting bored he just waited to see what the future brings to the underground, and as time passes one day he felt his unique power no longer under his control, as such he started searching for the culprit, only to find after a couple of days ago to goat people and a skeleton in his family's former home eating and chatting surprisingly making him feel sorrowful and sad due to the luck alike, making himself remember the good times of his life.
POV MANUEL
Manuel: Does anybody know why is there a moving flower outside locking like it is crying?
Toriel: Let's go and see if it needs some help?
Chara: Lucks ...like...one ...of ...the .....flower....were .....we ...died
Manuel: If you're wandering that may be him, it is possible.
And as such the trio exited their home and approached the sad flower, and as they got near it Chara's soul gave her the feeling that this is her brother, and she gave Manuel a nod to tell him that he is correct.
Manuel: Hello there my leafy friend can I help you with something?
Due to the different yet similar voice of the monster in front of him, he raised his face that is a perfect yet more flowery form of Asriel and.
Flowey: Ow golly who are you to ask me such things.
After his sentence, Toriel got surprised and shocked at the resemblance to her son, as she wanted him to be back and happy.
Chara: He.....is ...capable...to...help.....us...Azi
Due to the familiar and yet raspy voice of chara, the plant is stunned and surprisingly a bit more happy, which helps calm it down.
Manuel: What am I is not important now but what I can do for you is, due to my special magic I can help you become hole once more, and be capable to join us home and be as happy as you can for a monster of your capability.
Flowey: And how are you going to do it tuning me into what chara is will not work I lost my body when we died.
Manuel: Toriel does it matter if he retains some plant features if I can make Asriel more like his former self?
Toriel: It does not matter I will always love him as my son.
And as this was the final straw to break the bonds that locked Asriel's fragments from uniting, Charas shirt glowed wite and a monster soul with blue tattoos enter flowy and a cocoon of blue and green appears before using his plant form to reform his original body but with thorny like horns and plant-like tattoo's on him, and due to the demonic blood from Manuel that was used to separate the fragment before he broth back Chara he is not connected to toriel, and will not end here as he grows up together with his new brother and new skeleton sister.
Manuel: OK there is an adjustment period to control your body so Toriel after tomorrow morning can we start the training regimen?
Toriel: It is necessary to start so let's finish eating and get to sleep this is going to be enjoyable for all of us.
And as such after we rested and eaten breakfast we started with the basics and as time passed by I made sure to work with my energy's to learn how not to get others in danger, in the middle of the training Sans appeared and gave me some tips and got surprised when he met Chara who was curious to know how was he and his brother did, as the time passed by 4 months has passed and I grow to the same size as chara and getting bigger than her as Asriel was shorter than her before the new half-plant form, during this time toriel and sans discussed what to do to reward us due to a job well done, and decided a vacation to snowdin at the skeletons home will be a good chance.
Papirus: Wow brother I dint know King Asgore had three clones too fun-sized and a feminine one.
Sans: Bro they are not clones, this is Toriel the former quin and the kids are hers.
Papirus: Ok sorry for my rude behaviour then, I am Papirus the next to be a royal guard under the tutelage of Undying the captain of the Royal guards.
And as Papirus chatted happy toriel introduced Chara as well due to her hiding behind toriel,
as Papirus marvelled at the new skeleton in the underground he became good friend with all three children who liked his innocent yet naive view
of their situation, as time passed by a wick has finished and the little family went back to the ruins to continue their training, sometimes joined by Papirus and sans six months has passed from the emergence of Manuel in this world.
Toriel: As the training is almost complete the last test is you three going to the Palace and meeting the King, I will stay at a respectable distance while you go enjoy your way there.
In the last months of the training, manuel reached the size of sans, while Chara and Asriel bot half a head toller, Chara got her hair back in the form of red spectral form that can not be touched without using magic on your hands, and Asriel got a bit more filled in not ruining his cute but strong form while Manuel's tattoo's spread all over him and his living tool that took the shape of two strong yet fluffy extra arm's that can stretch and carry Manuel end some extra weight along with him when active and it looks like a large scarf when not in use.