From sir gawande and the green knight what does the description of the attire of the strange man say of his social status? and in guise all of green, the gear and the man; a coat cut close, that caught close to his sides, and mantle to match, made with a lining of furs cut and fitted- the fabric was noble

He is of high wealth, green stands for prosperity, life. The gold and the fur represent someone of wealth. As he is also a confident individual

Given that the only pronoun in the sentence is I, I will assume that is the underlined word. The pronoun I is used as a subject in this sentence (part of a compound subject consisting of two words, Suki and I). If we know that this is the subject of the sentence, we also know that its case is nominative, because subjects can only have that case. Hence, the correct answer is case - nominative, function - subject.