My protag is essentially a girl who have to solve incidents by helping her clients by helping them solve their issues, how to portray her empathetic, gentle side, note she's also supposed to be strong-willed and stubborn
So, I'm not a professional writer here, but since your character is stubborn, she should be really passionate about what she believes in. Maybe consider giving her some gentle hobbies, like painting. And remember to portray a strong bond with people she cares about.
Hope I could help!
Make her have a soft side for animals, perhaps own a kitten or a puppy?
Empathetic people really feel for others. When this character's friends are hurting, she's going to hurt too. Sometimes empaths feel things that even complete strangers are feeling.
Empathetic =/= pushover. A strong-willed empath is going to be very passionate about their causes, and a stubborn empath may push someone to get help, or in some cases, take too much on in the pursuit of helping others while insisting they're okay.
An empathetic person does not have to be soft or have gentle hobbies, they can be just as badass as any other character.
However, since you're trying for a gentle character, those seem to be appropriate. Maybe try art or gardening, or something like that?
As someone who considers themself to be an empathetic person, I agree with the above statement. I am more on the gentle side myself. Also, one of the downsides to empathy is that you tend to live and die with other people's battles way too much. Like, I have a hard time separating my own struggles and emotions from those of my family sometimes, and if one of them (especially my sister) is upset, I usually feel sad or stressed until she cheers up. This can go the other way, too–If I see someone or something in distress and I'm not already attached to it, I might deliberately distance myself so I can avoid the emotional pain. I know that sounds kind of cold, but this is what your brain does when it's constantly 'attacked' by negative things that seemingly don't bother others. It might be an interesting trait to give to your character as well. Hope that helps ^^ And if you want to make her strong-willed, go for it! I think we empathetic types need more bold, self-confident role models ^^