Meanwhile, as Lucina was running around the castle courtyard in joy about Robin's return, the tactician was having a brain seizure by listening to Naga talk about the abstract concept of alternate timelines. Naga was trying to explain it to the best of her ability, but Robin believes nothing could be more bewildering and infuriating. Robin has done a lot of difficult tasks in his time as a tactician, but none of them involved concepts he could not fathom with his own eyes. Even Miriel's scientific journals about gravity made more sense than the idea of infinite parallel universes, and that is saying a lot to Robin as Miriel's books has an overabundance of archaic jargon that only educated scholars would even have a chance of understanding.

According to Naga, after Lucina and the other children traveled from their future back into the past when their parents were still young and unmarried, multiple alternative timelines suddenly formed in response. These new timelines were created to symbolize all the possible ways the future could have been affected by the children's time traveling shenanigans. For example, in one alternate timeline, all the children died before meeting their parents and Grima conquered the world. In another, Lucina actually killed Robin after finding out Validar could control him. There was even one where Lucina actually stopped Emmeryn's death in Plegia, but Grima still destroyed the world under different circumstances. The list of possibilities goes on forever, all showing different ways the future could have changed by the children's influence. Keeping up with all the possibilities is making Robin's head hurt harder than the time his father used mind control on him.

As confusing as the concept was, Robin believes he has a general understanding of how the different timelines function after an hour of frustrations and careful analysis. But Naga's explanation does bring up a number of questions. Was the timeline he was in the real one? What happened to all those other ones? Why was Naga telling him all of this? Robin had to find out.

"Naga, sorry to interrupt." Robin blurted out, "But you said there were around infinite timelines, correct? Which one is the real one? Am I just in a fake reality?"

"I don't understand your question, Robin."

"Why am I not experiencing, say, the timeline where Lucina actually killed me after the escape from Plegia Castle? Am I just one of the infinite timelines and I just got lucky that Grima is defeated in this one?"

"No, Robin, keep in mind all these new timelines were created as a response to Lucina and the other children's actions. They exist because the course of history was changed with time travel. Fate was unsure how the shift in the time space continuum would affect the future, and so these parallel universes popped up as possibilities for what could have happened. Once Lucina and the others began to spend more time in your present and change events that did not occur originally, potential timelines that had Lucina do just the opposite simply disappeared. For example, I am sure there was one timeline where Lucina was too late to stop the assassination of Emmeryn that dreaded night in the manor. However, once that future was averted by Lucina's actions in your present and Emmeryn actually survived the assassination, all timelines where Emmeryn died that night simply disappeared because fate has been changed. It is the same concept with all the possible situations where Lucina killed you. After she spared your life, all alternative worlds where you died by her blade disappeared. As the actions of the children became obvious, false timelines simply disappeared. The number went down from around infinite to zero after Grima was defeated. You can rest easy that you are living in the real future."

"All right, that makes sense." Robin said. Naga's examples really helped him understand the concept more clearly, and he was determined not to think too hard about it. But why did Naga tell him such a confusing concept?

Robin asked a follow up question, "But why did you want to tell me all this? Is there still another version of history where Grima is still present and I need to slay him again?"

"Oh, heavens no Robin. You can rest assured Grima will never affect the world ever again. Because of your sacrifice, any timeline where he was successful disappeared after your sacrifice. Like I said, after Grima's defeat, the number of alternate timelines went from around infinite to zero. However, a certain consequence of my choice in another timeline that no longer exists is affecting the present. And that is exactly why I wanted to tell you about this. To explain someone else who will be coming into your life shortly. Don't worry, it is not anything malicious like Grima. I think you will be happy to hear about it, but I had to explain parallel universes for you because I know what I will tell you next will shock you without the background information."

Robin sighed a breath of relief hearing Grima was defeated in every other timeline. He did not want to go through the trouble of fighting such an adversary ever again. But somebody else coming into his life, who could it be? And why was Naga being so vague about her statements?

For the second time, as if Naga was reading Robin's thoughts, an image of a young girl with short, blue hair appeared in front of Robin. What Robin saw in the image did not make any sense. The girl was wearing the exact same robe Robin had on. She carried a fire tome in one hand and a sword in the other. Looking closely, Robin saw the girl was dressed the exact same way he usually did. If it wasn't for the blue hair, Robin almost could have believed it was an image of a younger, female version of himself "Naga, who… who is this?"

"That… is your daughter Morgan. I explained alternative timelines because she comes from one of them."

"My… my daughter?" Robin was shocked to hear such a statement. Lucina told him he remained single in the original world. He never married. Did he have a secret affair with somebody like he did with the Chrom's time traveling daughter?

"But that… that… that does not make any sense. Lucina told me I never married in her original future. All the other Shepherds wed and had their kids, but I remained single and childless up to the moment when Grima took control of my body and betrayed Chrom."

"Yes, and that is exactly why I told you about the alternate universes. You see Robin, she is also from another timeline different from Lucina's future. This is just one of the infinite parallel universes that popped up as a response to Lucina's time travel. In this timeline, after defeating Validar, the real Grima never showed up, and all the Shepherds believed that the war had been won and the rise of the Fell Dragon was averted. There was an era of peace afterwards, and many of the children settled down with their parents in the castle. After returning back to Yllistol, you and Lucina quickly got married despite the objections from Chrom. However, it was Sumia who managed to convince him in the end and you two began a new life together. It was good timing too, as Lucina found out after the wedding she was one month pregnant and that avoided some unnecessary implications. Sometime later, you daughter Morgan came into the world."

"That sounds like a happy timeline all right, but Naga, you said Lucina is the mother of this child? You are sure about this?" This parallel universe sounded like exactly what happened in the real timeline except that Grima never showed up."

"Yes, that is correct. Here I will show you undisputable proof she is Lucina's daughter." The image of Morgan zoomed into her right eye. Robin immediately noticed the Brand of the Exalt in her eyes, just like her mother.

"That's… the Brand…" Robin said out loud in surprise.

"Yes indeed. I hope this evidence should suffice."

Robin for a second almost did not want to believe it. He instantly blurted out, "It could be Cynthia. She also has blue hair and is a member of the Ylissian royal family."

"I can assure you it is not her, Robin. Cynthia died in that timeline before she married or had a child. There is no other possibility."

Robin had no doubt about Morgan's parentage, and did not know why he just said that. Robin knew there was no way she was going to be Cynthia's child, because he rarely interacted with Lucina's younger sister. He always just gave orders to her, but beside that, they really did not have any real interactions during the war. It had to be Lucina's child. The blue hair and the Brand all show it. Her robe and face proved who her father was. Robin immediately thought back to the conversation he had with Lucina. Was it the same child? The one that is still growing inside of her stomach? The story sounds like the exact same time when Morgan was conceived. However, Naga continued the story, so Robin had to put those thoughts aside for later.

"However, what the Shepherds did not know was that the real Grima that also traveled back in time with Lucina. He was bidding his time after Validar's death, waiting for the right moment to strike. You know how in the your world, the real Grima from the future showed up after you defeated Validar to summon the Fell Dragon immediately? The good news was, he did not have the power to be invincible like he was in Lucina's timeline. He thought he was strong enough for an early destruction of the world, but he underestimated the Shepherds. You managed to defeat him before he became too powerful, and I have you to thank for that."

Robin never thought about it like that. If what Naga said was true, pride was Grima's downfall.

"Anyways, I guess I will continue to tell the story where Grima simply choose not to interfere after Validar was slain. He realized he did not have enough power to take over the world yet, so he stayed hidden and waited for himself to regain the powers he lost during the time travel. After about a decade of peace where no major wars were fought beside occasional bandit attacks, he had found the perfect opportunity to strike. By then, you and Lucina had retired from the Shepherds and lived in the castle raising Morgan. All the other Shepherds were raising their own children. Nobody had fought in a war ever since Validar's death. However, that complacency and ignorance was the kingdom's downfall. Once again, the Fell Dragon appeared in the sky, just like how Grima summoned him that day after Validar died. None of the Shepherds could believe it. They thought by defeating Validar, the world was saved. However, there was no time to be wasted, and Chrom immediately set out to reunite the Shepherds and the army to fight against the threat. But however, it was way too late. By now, he was invincible, and nothing could even scratch the dragon. Risen once again began to appear in the millions, and they overwhelmed entire armies by their sheer strength. Regna Ferox fell first. It would be no surprise if Grima was silently building a secret army while the kingdom was growing complacent from the peace."

"So, I am guessing we all died just like in Lucina's original timeline?"

"Yes, it is not hard to guess how this ends. All the Shepherds were easily defeated by Risen and the remaining survivors went into hiding. You, Lucina, Chrom and the remaining Shepherds choose to make a last stand at Ylisse Castle while you sent all younger versions of the children to places where Risen had not yet infiltrated. It was a heroic last stand, but the waves of Risen were no match for your ragged army. After a week, the castle has fallen and Ylisse ceased to exist. All the survivors of the battle were executed mercilessly by Grima's army. Grima was now strong enough to take possession of your body and made you become the Fell Dragon's host once again. All the younger versions of the children escaped, but you used your special abilities to teleport Morgan back to the castle. After that, she became easily controlled via mind control by Grima to do his bidding. Morgan became the crown princess, and you sent her to hunt down all the remaining children. Morgan succeeded in the task after another decade, and all the younger versions of children were killed. I guess you could say that all the Shepherds and their children were erased from existence besides you and your daughter."

"No!" Robin screamed out loud. "This can't be real! What about my wife, surely Grima spared her?"

"No, the older Lucina fell in battle."

Naga must have seen the sight of desperation and tears in Robin's face and quickly assured him otherwise.

"Do not worry Robin, I think it was better that way. After all, she was the one that caused him so much trouble and forced him to time travel back. You can no doubt be assured he had many painful tortures planned for her had she survived the battle. You can consider her death a blessing. Also, like I said, none of what I am saying happened, because reality turned out to be much different due to you and Grima's actions. That was just one of the possible timelines."

Robin immediately felt better hearing that, but he could not stand hearing the fact Lucina could have possibly died. It made his heart break just thinking about it.

"Anyways, back to my story. After all traces of the Shepherds and their children were exterminated, Grima called for Morgan to slay Naga as the final step to ruling the world with no opposition. However, before that plan can be put into effect, the Naga from that timeline, in a last resort situation to save the world, erased Morgan's memories and sent her back to the past, or the timeline you currently inhibit. It was a last desperate attempt to stop Grima from manipulating his daughter and hopes that fate can be changed."

Naga continued, "However, the Naga in that time period made one mistake. By erasing her memories before sending her back into this timeline, she was in the same situation you were in when you first awoke on the field outside that town. She had no idea where she was, and because she was sent back alone from an alternate timeline that nobody knew existed, none of the other children knew about her. I am not sure what she remembers, but I can confidently say she will remember you as her father. All the children that came with Lucina in the original timeline were all reunited because they knew each other. Nobody knew about your daughter. She is currently in your world somewhere, still confused about her situation, waiting for somebody to explain everything."

Robin could only listen in shock as Naga finished the story. He was silent for a long time, trying to make sense of everything. According to Naga, he had a daughter with Lucina that came from an alternative timeline. He became Grima, so Naga in that timeline sent Morgan back to help him. However, because nobody in the Shepherds knew about her, they never found Morgan and she is currently stuck in this timeline, confused about her situation. Robin was not sure whether to feel happy or confused. He was happy to know he has a child, but confused about what the hell is going on.

Robin finally managed to compose his thoughts to ask one question, "So my daughter, she's currently in Ylisse?"

"Yes."

"In this timeline?"

"Yes, the only timeline."

"Where is she right now?"

"You don't need to worry about that Robin; I have located her whereabouts. You will meet her the moment you come back to Ylisse from the dead. I will appear in front of her and tell her that she will be meeting her father. I will then teleport your daughter where you will return, in the field outside Southtown. You should see her shortly after you wake up. However, she lacks most of her memories, but I am sure you can handle such a miniscule problem. It was a pity she never helped you in the war like I intended, but at least she was safe from harm all this time. I don't have the ability to send her back to her original timeline. Like I said, those timelines no longer exist now that Grima is actually defeated, so she is pretty much stuck in your world. Be sure to take good care of her!"

Naga's illusion started to fade and the light began to dim. Robin realized that Naga was starting to leave. He quickly shouted out loud, "Wait Naga! I have so many questions about my daughter. What does she remember? How old is she? When will I leave this place so I can see her?"

Naga's light stopped dissipating, and Robin could see the goddess's illusion brighten again. He squinted his eyes.

The goddess responded, "I don't know how old she is and what she remembers. I am sure she remembers who you are. I will say that you can leave once I am sure traces of Grima are completely gone from the world. A part of his soul is still alive in this dimension also, slowly falling out of existence. I predict it would take a week before this trace of his soul goes away, and there will be no evidence he ever existed. If I let you out too soon, there is the miniscule chance he can use that piece of his soul that is still hanging onto the last shreds of life to resurrect himself in the future, even if it takes a million years. Just be a little patient. I know you are dying to see you daughter and your loved ones, but as soon as this final piece of Grima's soul disappears for real, you will be free to go!"

Naga's illusion started fading once again and even faster this time. Robin yell one last thing, "Naga, Grima is truly dead right? Just want to make sure!"

However, the goddess was already gone, and Robin was back in the same dark dimension he had gotten accustomed to.