Unnamed baby

In Trinity III
In Trinity III, the character Unnamed Baby is introduced. Their gender is never stated, but they claim to have been stillborn and tell Sensei that they are ultimately unimportant and can be forgotten. They tell Sensei that his role in this world is to kill God and repair the world, and that they've gotten this information (among a number of other facts about Sensei's life) from "one of the three gods". They refer to HOPE as their "boss".

Although HOPE has previously been associated with the Concerned God, by the time of Trinity III it is most likely under the control of USER1, aka Nozomu. As a result Unnamed Baby' s true allegiance is unknown, although with the goal of "killing God" it seems likely that he is an agent of Nozomu, at least by the time we meet him/her.

In Reality
Unnamed Baby is most likely a direct reference to the abortion that Maya Prime underwent, likely under pressure from Sensei Prime. The guilt of his involvement and his failure to act as a proper father likely led to the subconscious creation of this entity within the world of Kumon-mi. The fact that the baby is unnamed is most likely due to the fact that Sensei has tried to repress the memories and guilt of the event, trying to pretend that his child (most likely a daughter) never existed in the first place. Ami, alongside her role as an idealized surrogate for Maya Prime within Kumon-mi also serves as the grown up version of Sensei's daughter, hence her subconscious desire to consider Sensei her father.