Would the fact that the title is called Bloom because the girl in the book blooms open her new personality be a symbol or irony?

I think it would be a symbol.

To determine whether the fact that the title of the book is called "Bloom" because the girl in the story blooms open with her new personality is a symbol or irony, we need to understand the definitions of both terms:

Symbol: A symbol is an object, action, or idea that represents something beyond its literal meaning and is often used to convey deeper meanings or concepts.

Irony: Irony is a literary device where there is a discrepancy between what is expected to happen and what actually happens or between what is said and what is meant.

In this case, it seems that the title "Bloom" is more likely to be considered a symbol rather than irony. The title suggests that the girl experiences personal growth and transformation, just like a flower blooms and blossoms with new life. The use of the word "bloom" implies a positive change or development in the girl's personality, which aligns with the idea of personal growth or self-discovery.

On the other hand, irony would suggest a contrast between expectations and reality. If the title "Bloom" was used with the intention of highlighting a character who doesn't actually experience personal growth or develop a new personality, that could be considered ironic. However, based on the information you provided, it seems that the title serves as a symbol rather than irony.