Human With Recollections

This unaccounted human was unique among the first humans seen on Earth for two reasons. The first was that they had the intuition that there was something they needed to do. Secondly, was that they did not appear to have had an angel spirit fly into them as other children had. In the Seraph of the End series it may be the case that this human was linked to either Mikaela or the the homunculus named Yu.

Appearance
The child was plain looking, with no major notable traits. Having hair was a rarity among the children, and this one was no exception. They had wide eyes with thin eyebrows above which done little to set them apart from others. Their most notable quality was how there was nothing physically notable about them, sharply at odds with their nature.

Personality
Compared to other children who were curious about the world, or were reacting to their new environment, this one made no comment upon being brought into the area. While they appeared startled it seemed linked to their thoughts, which they kept to themselves in any case. Instead of reacting to the world, the child contemplated whether it had to do something. Having such a thought was considered to be weird.

Prehistory
This child plops on their back on the ground having been ejected by a homunculus. Taking to kneeling, the child makes no comment on the other children around them, neither the adult figure of Sika Madu in the area. Speaking aloud to themself that it is weird, the child thinks for some reason they have this feeling there is something they need to do.

Story
The production of this child is the final aspect of the memory that Yu sees after he and Mika have entered them to explore details of the past. At that point, Yu gets it as he begins speaking to Mika on how in fact it is Yu who has Mikaela's memories. It is possible, but cannot be assumed that the child's experiences were also seen by Saitō who is accessing the First's memories directly from their present day location in Shibuya.

Child Resembling Yu
The child would be brought into the world shortly after a child resembling Yu of the present times had been murdered. Where that child had Mikaela's spirit inside him who had erased his own memories, it may be a possibility that this child would be a new vessel for Mikaela's transferred spirit.

Homunculus Named Yu
This child was dropped into the world from the body of a specific homunculus, one named Yu. Like other children, they made no reference to this distinct floating sphere-like being. On account of homunculus' connections with Black Suns it is very feasible that the child was simply not able to see it. There is also the prospect that this child contains aspects of Yu the homunculus, namely the memories that it is to pretend to be Mikaela.

Sika Maku
In the vicinity of Sika Madu who had just recently essentially become the first vampire seen on Earth, the child like others was being brought here at hid direction in order to gather darkness. Likely unknown to the child, the darkness it was to gather was a part of Sika Madu's plan to resurrect angels who had perished.

Mikaela
The child had just missed the deceased body of Mikaela expelling seven keys of light across the planet. Perhaps not seeing his coffin, or knowing who Sika Madu's son was, this child may be linked with him should they be the vessel for his soul. Alternatively, the child may be involved with Mikaela's different resurrection plan in the event that they are connected with the homunculus in any way. In any case, although the child was physically brought into the world by Yu the homunculus, and to be tasked by Sika Madu to gather darkness, their greater fate was tied with what Mikaela had in mind.

Human Link Between Bael and Urd
Delivered into the same area, this child was around a child who appeared to contain the angel Bael's spirit, that may one day be passed into who would become the second progenitor vampire named Urd Geales.

Human Link Between Paimon and Saito
As with the other possible link, this child arrived after this child had arrived on Earth. They are in the same area as the potential human with Paimon's soul who would in the far future become the other second progenitor vampire, Saitō.

Saitō
They may be known to another from present times, namely Saitō.