system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Why doesn’t Powergirl wear the House of El “S” symbol anywhere on her?
gpt
At one point she mentioned that she wanted to create her own symbol to put on her costume, but could never come up with anything, so she just left the hole there. 
She fully admits she knows people think she's being lewd but she can't think of anything. The hole is both literal and a symbolism of the emptiness she feels inside.