how to write a character with synesthesia?

hello! to start off, i don’t have synesthesia myself, but the main character of my book sort of does? i only say sort of because i initially just wanted her to be an empath but at some point i started writing her as someone with synesthesia without realizing it. if im wrong and she doesn’t please don’t be afraid to tell me to kick rocks lol

for context, my book is a fantasy one and the main character (asha) is a witch who is also an empath. she can taste, smell, and feel other people’s emotions and magic (both are intertwined in this world because doing magic is often a very emotional process). and by feel i mean when someone is angry she feels a stinging sensation in her side or something not that she feels their emotions. I’m not sure if this is synesthesia, but if it is, is there a specific way i should go about describing it? so far i’ve been saying it’s just an extra sense of hers. any input would be great!