Teddy from Emily of New Moon by L.M. Montgomery (nanashi's childhood crush)
9w1
he's the best friend of the main character and is also an artist. Main character seemed Ni, to me. It was easy to relate to her as a kid. I bet the IEI typing for her is a pretty good one.

and

Theodore "Laurie" from Little Women by Louisa May Alcott

4w5 (2019 movie) or 7w6 (book)
he's the best friend of the main character and falls for her sister.

oh, and Amy March in the 2019 movie alone has been typed ENTJ 3w4, and she and Laurie have the duality thing. In the book ppl have been thinking esfp for her.