you are right on track with the asian soup. i haven't tried the spicy kind though. that sounds great! i usually go for wonton soup or miso.
if i'm sick, and actually have an appetite for more than brothy soups, what i want are the things i love any other time, my favorite foods. same as when i'm emotionally under the weather (unhealthy maybe, but it works for me). enjoying the things i love best comforts me, and even if the foods are in no way medicinal, i feel better. i'll take sushi or spaghetti bolognese or some ditto's citrus cod with mashed potatoes, please!
hope your pal gets to feeling better soon

chi mangia bene, viva bene.
amen.