Monjumaru was the childhood name of Yorimitsu. His younger half-brother Yorichika is said to either be named Muchimaro or Fugenmaru in his childhood; I decided to go with the latter. Dōji was the childhood name of Abe no Seimei (though game canon says otherwise)

oOo

"Is that what you think? I understand."

All alone in the room, surrounded by nothing but scrolls and star maps, the boy sat by himself, softly talking to the armored warrior doll in his palms, carrying on a conversation even though there came no answer. The boy, Monjumaru, knew no one wanted to be near him because of this, not even his family's retainers, not even his brothers, not even his mother and stepmother who both called him "wicked little demon". Nobody but his father Mitsunaka and his friend Dōji believed him when he said his doll and whatever inanimate objects he talked to did answer him, that they had living, breathing souls within them that he could communicate with. To them, he was just a deranged boy talking to himself. To Mitsunaka, he had a gift. Monjumaru's father was nothing short of openly favored him, teaching him the arts of onmyōdō and granting him a room full of books, the very room he was sitting in and chatting with his doll. One too many times, the family's servants found the boy too carried away in conversation with bird eggs or rocks he forgot his meals. One too many times, he was found sleeping upon a bed of open scrolls. His father's reaction to everything, as expected, was hearty laughter and patting his back, while everyone else had all the more reasons to look at him with disgust every time they saw him.

On the one hand, Monjumaru appreciated his father's granting him love and being by his side. On the other, he felt sorry that Mitsunaka too was soon labeled "freak" along with him. But, it couldn't be helped.

Monjumaru was in the midst of telling a lengthy story to his doll when he was interrupted by the door to his study being rudely slid open. Feet stomped towards him, and a warrior doll – more accurately, two parts of a warrior doll, the head completely severed from the body – was unceremoniously dropped to the floor right before his eyes.

"Kabutomaru! I was looking for you! How did you become like this?" Monjumaru cried before looking up at the person dropping the dismembered doll – his younger half-brother, "Fugenmaru! How dare you…"

"You're gonna cry over a piece of wood? Seriously, you still haven't changed at all, have you, ani-ue?" Fugenmaru chuckled contemptuously, fingers pressing his brother's forehead in a mocking gesture that made Monjumaru's blood boil.

"Keep your hand and your nonsense to yourself." Monjumaru breathed through clenched teeth, "Do you think you can just kill my best general and get away with it? I'll make sure you'll pay for what you've done to Kabutomaru!"

"And how exactly?" Fugenmaru said, showing no signs of backing down, "You're not as good with the way of the sword as I am. You've never won a single duel against me. You think you can make me pay for what I've done to that little piece of wood? Don't make me laugh." he reached for a scroll upon one of the many stacks of them, all while taunting, "I have the skills of a warrior, and what do you have? Just a bunch of scribbled paper and drawings!" he unwound the scroll and, with the dagger he used to behead his brother's doll, stabbed and cut a long line along the paper, "Why do I have to live under the same roof as a freak? Why do I have to live with this utter disgrace to the Minamoto clan?"

"Fugenmaru, you insolent bastard!" that was the last straw for Monjumaru, and he raised his voice, "That is chichi-ue's most treasured encyclopedia! You just wait, Fugenmaru. Soon, you will regret committing such reprehensible actions! I will take revenge!"

"Like, welcome to Fujinomiya, I guess." Nansen gave what could be called the indifferent greeting to end all indifferent greetings to the blond sword in a white suit before him. Said sword, Higekiri, neither minded the chilly reception nor his limbs' being weighed down by Hizamaru clinging to him (finally anija came home I miss you so much) and Imanotsurugi also clinging to him (finally the Genji family is all together let's play). "Y'see, this is your new home. We got all kinds of stuff – horse stables, outdoor bath, garden and fields. You'll share room with your little brother. Your mission is heading to the past to fight the bad guys trying to screw up history. Now, all three of you follow me to our master's room, we have urgent business."

"What kind of welcoming is that?" Hizamaru complained, still not letting go of his brother, "You're not gonna show my brother around? You're not letting him spend a few minutes with me at least? How rude!"

"Yeah, why don't you at least let Higekiri-san play with us for a bit?" Imanotsurugi chimed in, "Is it really that urgent?"

"Master requested that I summon all Minamoto swords ASAP. They say that it's a serious mission involving the Minamoto clan." Nansen explained before leaning in extra close to whisper to Higekiri, "Fun fact, our current master is a distant descendant of the Minamoto clan. Even if they seem to favor you guys this time, keep in mind that I am their second-in-command. You'll never rise above me."

With that, Nansen dragged the trio away.

Awaiting the four of them in the darkness-filled saniwa's room were the other two Minamoto swords, Iwatōshi and Shishiō. Before them, facing the six of them with their back, there their master was, who began in a hoarse voice, "Ah, Higekiri-kun. It's a pleasure to finally have you here with us."

"You're welcome. It's a pleasure to meet you." Higekiri answered, sitting down along with the others. He couldn't help but feel somewhat distrustful towards Nansen's earlier words upon seeing the enigmatic figure whom he called their master. Is this person really related to the family I served all those years?

"I have summoned you all here today to make an important announcement." the saniwa went on, "The government has asked me to have a look at suspicious activity taking place in the mid-Heian period. It seems, this time, our enemies are targeting the Minamoto clan, specifically the famed onmyōji Minamoto no Yorimitsu."

"So all we have to do is not let them lay a finger upon Yorimitsu, right? That should be a piece of cake!" Iwatōshi said, his loud voice reverbrating throughout the narrow room.

"Do not interrupt me, Iwatōshi-kun." the saniwa raised their voice, "This time, it's not as simple as that. Because," they paused for a short while before continuing, "not only is the outcome of history dependent on its success, so is the existence of all of you, of the touken danshi. Fail and you all shall vanish from all planes of existence."

It was as if lightning struck down on the swords the moment their master finished.

"We will all disappear?" Imanotsurugi said, clinging to Iwatōshi's arm.

"It's a little known secret, but Yorimitsu is the first in history to ever bring the closest to a touken danshi into this world. It's safe to say that he was the first saniwa, and I, a distant descendant of the Minamoto, have inherited the power. Because of this, it's speculated that the Revisionists plan to convert Yorimitsu to their side, therefore gaining a powerful ally and rendering anyone having inherited the power throughout the span of history ones of theirs. I too will turn evil if they're left to do as they please. Since Yorimitsu is such a valuable target to them, they will very likely go all-out on this. This will not be an easy mission. I wanted to break the news to the Minamoto swords first, but just the five of you will not cut it. I'll send three teams of the most powerful fighters in the Citadel – whose list I'll give you right now." that said, Konnosuke hopped out, holding a folded sheet of paper in its mouth.

Nansen took the sheet of paper and spread it out on the floor. He took out a tiny flashlight he kept in his pocket and turned it on, allowing everyone else to have a look at the list.