Earth i is an independent time and space that follows the model of Miss Conch, where DC and Marvel superheroes and villains live. One of the characteristics of this time and space is that the time value in it seems to be flowing, but all residents are always in a fixed age group. Children will not grow up, and adults will not age. The dead cannot be resurrected, and new lives unrelated to the main characters will not be born. The passage of time is almost meaningless to them.
In Earth I, no one is allowed to question the "constant status quo", even if the questioner is deeply favored by the "Creation God". The first victim is none other than our magical boy, Robin. He lives a full, passionate but essentially unchanged life with Batman and his gang (members of all eras of the Teen Titans). He has not fully understood the truth of the world, but he has realized that growth and death are zero-probability events in his life, or at least will never happen again to intelligent life forms. However, his strong thirst for knowledge and questioning spirit, which is appropriate for his current age, almost became the missile that killed the mockingbird.
Concept: Endless life and an immortal body seem to give people unlimited error tolerance, but they will gradually make people forget the value of their own and other people's lives.