For everyone wondering about Aisha's age: She's 21. She woke up from the casket at 18, and in the description of the manhwa it says she's been in that world for 3 years so she's 21. There is one point in the manhwa where it says been there five years, but all the earlier stuff says three years.
For the people talking about the dress she's wearing in this chapter while she's talking with her father, it's a nightgown. She's even got slippers. It's not supposed to be fancy or grand, just comfortable to sleep in.
As an addition: In her past life, she was 27. Technically she would have been 30 by now if she was still alive in her old world.