In this sentence the indefinite pronouns are "SEVERAL, MANY, and US". As regards "several", it refers to the constellations cited by Mrs. Kim whereas "many" refers to the myths discussed. In the case of the pronoun "us", even though it is a personal pronoun, it is also indefinite in this context since it does not point out to any particular person.
The words in this sentence that are indefinite pronouns are several and many, although they aren't exactly used as pronouns in this sentence, but as adjectives. There is another pronoun in the sentence, the word <em>us, </em>but it is a personal pronoun.
Well, personification is adding human attributes to non-living things. EX: "The sun glared angrily at me." The sun isn't able to "glare angrily" so therefore that is personification. Hope this helps. :)
