蟲
So kind of recently gaia put of two episodes of mushishi (spelled 蟲師).
I thought it was kind of weird that a character with three 'mushi' (insect) in it would still be pronounced 'mushi'. Before I continue, I'd like to say I know basically NO kanji (around 200-300 characters). So I thought maybe that the first character was 'mu' and the second was 'shishi', but the main idea of the story is that there are these creatures called 'mushi' and a person who is a 'mushi*shi'.
I tried looking up the kanji, and got 'teacher' for the second character (still no idea how it's used, I always say sensei). But I still couldn't find out what the first character meant. I asked my mom (who is Japanese) and she didn't know what it meant.
So my questions are:
1) Is '蟲' an actual kanji character?
2) If so, what does it mean, what are its other readings, and what are some examples of how it is actually used?
3) If not, is it hanzi, is it made-up?
4) If it is hanzi, what does it mean?
5) If it is made-up, do people make up kanji like this a lot?
6) Care to tell me anything about 師?