From my observation, Eren is somewhat fitting the stereotypical autistic character. Highly focus, not good at social, high talent in a particular field.
Describing Akari is similar to her is a bit odd to me. Akari is more on Narcissistic Personality Disorder to me. (I am not in any psychological field, I just get to know a shallow knowledge about psychology) Telling me they are similar is basically telling me that they are both falling into some kind of psychological disorder.
I know in Japanese society it is very important to work as a group, should not be very distinctive, which makes people like Eren and Akari very difficult fitting into the Japanese ecosystem. What I see is that Akari is pretty much able to adapt that being unique atmosphere. Yet, she wants someone understand her, which is also a normal behavior for a human being.
This is a very unique perspective to view on two distinct yet similar people in some sense. However, working in art related field must encounter these type of people as these people are actually the major contributor in the art industry and this is undeniable.
