-My mum told me that those who have marked wrist are angels.

-I'm not an angel.

-Of course you are. Mum said that only angels harm themselves because they don't like earth. This world is destroying them so they try to return to haven again.
They are to sensitive to the pain of others and their own.

-You know, your mum is very wise.

-Thank you. She's also an angel but she has already returned home.