Can anyone please let me know what this is supposed to mean? I heard that it’s a sound effect or sfx like Japanese symbol, but I’m not sure. Thank you!
It's three distorted small-tsu's in katakana (
ッッッ), which is like
I heard that it’s a sound effect or sfx like Japanese symbol, but I’m not sure.
Yes, ブワッ is a sound effect for something spreading, exploding, overflowing, etc.
Additional ア and ッ just strengthen it.
In this case, it represents his blood spouting out.
ブワッ is a very common sound effect and used in various way.
Translation list below would help you.