I don’t think Kagome’s Se is as helpless as an IEI’s suggestive Se. It seems a little stronger than that. I could see Kagome being EIE with mobilizing Se, but not suggestive Se. She doesn’t seem to have that much of a problem motivating herself to act or to use force on others. She seems to use Se on Inuyasha almost effortlessly, which to me seems more like demonstrative Se, but I think an argument could be made for mobilizing Se.
I also just can’t see Kagome being an introvert at all. She does introspect but she’s not really lost in her world of thoughts and feelings. Just how I see it. I think Socionics is subjective, as most personality theories are