Canon is Undertale *Heavy spoilers in the comments*
My dearest child... I don't know what to say. I am glad you loved our world so much but there are so many things to do and a certain bonehead wil certainly miss his bad pun partner if I leave now, may I...
Oh... oh my, you really know my weak spots, don't you? Calling me mom again... I guess I will stay with you a little longer.
Oh... oh my, you really know my weak spots, don't you? Calling me mom again... I guess I will stay with you a little longer.

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I'm afraid it's a term that means nothing when used by those that consider it a joke...
1/2
The comment towards him makes him pause.]
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Golly...? Ahem... Oh, little flower, I can take jokes. To be honest, I'm a master of puns...
On Valentine's Day flower prices rose to the occasion.
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... and, could you mean... did you perhaps bloom in the small patch of flowers in the ruins? The one I used to look after?
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...
Does the name Asriel mean anything to you?
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[Of course it does, it still means the world to her. And the name still manages to bring back the pain. Sometimes Toriel almost wishes she could forget and move on, especially now that Frisk is now her adoptive son, but the void in her life left by Asriel's death will never be filled.]
Don't. Please... I don't mind if you make fun of me in any other way, if you have other cruel jokes... but don't speak his name. It's been a long time but it still is an open wound.
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[No amount of hate directed toward him would make him feel any regret.]
Poor Asriel Dreemur, whose friend died of illness...
Poor Asriel Dreemur, who was killed by those humans...
Poor Asriel Dreemur, who was taken away from her mother and father...
Look at you. You treat me with such disdain.
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...
...I'm Asriel. I'm your child.
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Stop. Stop! Please...
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[Resets? It's something she cannot understand because her DETERMINATION never allowed Toriel enough strenght to load any save state... but she completely forgets about it when the flower speaks again. The queen gapes, staring at it for a long moment, then she bows her head. Monsters tend to be caring by nature, even if weird, but that world isn't free from cruelty... and... if that was a joke...]
... prove it. Tell me something only my son would know.
Can't think of anything canon, so have a little headcanon if that's okay with you
[Please let that be enough...]
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My child, my precious child...
[Uncaring of how dangerous the creature could be she just tried to scoop him up between her arms.]
I... you... how?
I have to leave for a couple of hours, see you later (I hope)!Cya when I get up as I might be going to sleep, too
...But nothing came. Flowey hugs Toriel in hopes that something would happen.
Nothing happens.
...]
I... I don't know. I just remember waking up at the golden flowers at home, scared and alone. And I couldn't feel my arms or legs.
My apologies, it took me longer than I expected.
You... why didn't you tell me or your father? My poor, poor sweet child, I don't know how your soul ended in a flower but... I am so, SO glad you're here now. Even if in a different body.
And worry not, my dear, Mother will take care of you, Frisk and your father will also be at your side- [Not that she returned with him but he insisted so much to be the school's gardener] We will make sure you have the best sunny spots to bloom and the purest water...
Anything you may need, I only... I only want to keep you safe. And, if possible, happy too. And.. sorry if I couldn't save you.
[If only she could share a small part of what she's feeling right now... ]
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...But...]
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...It... didn't. I don't have one. I can't feel a thing.
...
Maybe you should just forget about me.
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I... I am so confused. [And she noticed the fabled 'friendliness pellets' of yours, she just no longer cared.]
Never. I don't understand, my dear Asriel, but I will never ever forget you, nor I will leave you behind now that I found you again.[Toriel gently petted his petals] I couldn't forget you when I thought you gone, how can you ask me to pretend... how could I turn a blind eye knowing you're here? Aware that you need help?
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...
You know absolutely nothing. But perhaps it's better that way. You wouldn't abuse that power like I did... Like I begged Frisk not to.
There's no way you can help me. Yes, I want a soul, but... I can't take anyone's soul. Their compassion would just force me to give it back.
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I do not understand completely what you're talking about, my dear... nor do I know what kind of power Frisk had, all I saw was his determination and his unconditional love for those around him...
...
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I know for a fact you'd love to live with Frisk and your father. And they would love you so...
[And she just smiled. Because Toriel never had enough determination to do a time skip, but enough to try her best to protect those dear to her heart. And, sometimes, even those who didn't deserve it.]
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You... Y- you...
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[Flowey feels nothing. It's okay for Toriel to absolutely despise him if it meant Toriel keeping her soul to herself.]
But since you're offering...
[Flowey summons a bunch of bullets around Toriel and jumps out of her hands, reattaching himself to the ground.]
Done
1/?
You are right, I am pathetic... but somehow, even if it was a lie would be better than the painful truth I live in.
But...
2/?
I really, really wanted to believe my Asriel could return. To be able to speak with him again, to see his smile again... I still dream of such wonderful day even if I know it will never come.
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But... But...
You're wrong. Remember the only real rule of this wonderful world we live in.
[She calls for the power of fire only to protect herself. Toriel may be furious now, sad, angry with herself for believing the flower but she learnt something watching over Frisk.]
No one has to die.
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[Looks like it's battle time. Flowey opens the battle up by flinging the bullets at Toriel... a little wildly. He doesn't want to kill her, only scare her away. And if they get dodged, well...
>FIGHT
>ACT
>ITEM
>SPARE]
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[See? That's the face of someone ready to spare the heck out of you. Even if she did her best to cover herself from your hits she's not going to ruin a true pacifist run.
Also, oh the heartache the mun feels listening to that track...]no subject
Oh wait, you already killed her once. A shame if it were to happen again.
So wouldn't it be best to just say that Toriel runs away, wouldn't it?]
Golly, you're a lot like the human, aren't you? ...But that's the only way you'll be like him! You're just too weak!
[Flowey summons three sets of bullets and chucks each set at Toriel one at a time.]
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Toriel? You're here too?
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[Excuse her while she leans closed and hugs you, Toriel couldn't control herself]
I am here too, my child. And I cannot express my joy in meeting you again... but... tell me, Frisk, is your mun-caretaker treating you well? Are you eating enough? Do you perhaps need clean clothes?
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I'm - I'm okay. I got enough clothes and food, including some neat ballerina clothes and Nice Cream and stuff. The mun really likes me and says that twice was enough and... yeah.
You don't remember, do you? Or maybe you do, here.
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That's good, that's good. I'm glad to hear you're fine, you deserve all the happiess in this world... and remember, if anything will ever trouble you... I mean... I will be here for you. Always.
...
And I'd love to see you in a ballerina dress.
I'm not sure I understand, my child... but my mun just bursted in tears and started begging for forgiveness...
look who attempted a no mercy run and ended up crying and abandoning her title as completionistyou have won the true battle, also you may want to tag this 'spoilers in responses'
...the second time was really nice. I made a lot of friends in the underworld and I introduced them to my friends in the overworld afterwards.
...
(and now for the gutshot)
You must really miss Asriel.
It felt... liberating when I gave up? And I just mentioned in the title that this is spoiler heavy..
I know you made lot of friends, sweetie, the whole underworld loves you and we couldn't hope for a better ambassador between those who always lived on the surface. I...
... how do you know about him? Was it... did ASGORE...
...
I do miss him, my child. But he's gone and no amount of grieving will bring my son back to life.
[She IS trying to move on, it just seems impossible. At least, thanks to you, she finally left the RUINS and managed to find new friends herself.]
So you did. Sorry, just determined not to spoil anyone accidentally.
(How to explain this?)
Asgore and Alphys told me about them the second time. Asriel was... I mean he must have been really nice.
(Of Chara, they will say nothing else. They have nothing nice to say.)
You're right. I just didn't expect this post to turn in a train feel. I love it.
[Toriel tries her best to offer him a wide smile but her DETERMINATION isn't enough, only a pained and small grin manages to surface on her face]
He was. Asriel was such a sweet boy, a kind hearted soul whose laughters filled my days with joy. He and Chara were my happiness... but an illness took Chara away and... and...
[The creature sighs and covers her face with her large, fuzzy paw.]
My apologies, young one, you shouldn't see me like this. Especially considering how lucky I am now, blessed with your company, gifted with the joy of another wonderful son. You, Frisk...
...
You're the one who allowed me to be happy again.
[Not that she will ever forget her children but she found another reason to live for.]
I do apologize if the grammar isn't perfect but I'm not a native speaker and it's 3AM now where I live.case in point, that dropped period that I corrected with my DETERMINATION
But what good would taking away those happy memories do, and what harm would having them cause?
Frisk thinks a LOT about the consequences of their actions these days, especially given the first time. Especially talking to Toriel.
But on her last words, she smiles.)
I get that a lot, Mom.
...do snails actually taste good? Cause there are some humans who also like them but I've never actually had any.