I always liked stories where people who were raised in cults or like human weapons try to reintegrate into normal society. It's a fun thought experiment on how their upbringing clashes with a standard culture. We're only a couple chapters in, but Hikari's actions are pretty interesting:
- Never complain about injuries and press on with your task.
- Cannot understand the idea of personal desires, just follow orders.
- Needs a 'master'.
Most manga tend to speedrun the healing process of people like this, but I personally hope Hikari's growth takes a while, since it would feel more natural after 10 years of mental conditioning.