Howdy o/, so some of the characters have some name changes going on 👀, what is both the out-of-universe and in-universe reasons for these name changes?
Um...holy cow. You legit just read mind. Okay!
Meta Reason: I wanted to separate some characters from their canon counterparts to avoid confusion, but I only do it if there's some mild/huge changes.
In-Universe Reason: Like with past memories, a person's name in the current timeline shows how even with or without those memories how different they are in personality/alignment/gender/status/etc.
People under this tier are the same as their past selves to the point that if they regain their past memories, they would identify as their past self.
Examples: Midoriya Izuku, Todoroki Shoto, Yagi Toshinori, and Kayama Nemuri.
Tier 2: Little to Mild Changes to Name
People under this tier have some slightly different change to their background. The change will vary depending on severity of the name change. Usually focuses on the person's given name. If they were to regain their past memories, they wouldn't identify as their past self, but would see their past self as a part of them, often out of respect or regret.
Examples: Victor Bakugou, Uraraka Sakurayu, and Iida Tenma.
Tier 3: High Change to Name
People under this tier are so unlike their past selves, others who do have memories of the past won't immediately recognize them. Their background will often have little to no similarities to their past self's background. Full name changes, even family name. If they were to regain their past memories, they would consider themselves a full reincarnation of their past self.
Examples: Volante Tafoya-Litvinov (Aizawa Shouta), Sunnetta Greenfield (Yamada Hizashi), and Xiaoyun Bai-Iqwe (Shirakumo Oboro).