My elder sister 我姐姐 is 是 the most interesting people 最有趣的人 I know 我认识的.
My elder sister is the most interesting people I know.
欧美人在称赞某人做事有趣风趣可以用funny,这个词并不是可笑的意思,so,
My older sister is the funniest person I ever met.
My elder sister is the most interesing person who I know
my sister is the most interesting one who i recongnize