Neither lanai nor i qualified for the final rounds. determine the case and function of the underlined pronoun.

I'll assume that the "I" is underlined.
The word "I" just references yourself and makes the reader know that you are talking about yourself and not some other person. As for case, it is Subjective; Lania is the complement of the subject, which is "I."

Iwould say you should mainly cover the areas about how it has no health issues or concerns, and also cover the cost, and benefits.