Character Design Critique and Comments

On Lesson 2 (week 2), we had a WIP - work in progress sharing session. During that session I've shared my game idea, flow and character design. There were lots of Critiques in the character design and I'd like to point it out to make sure I refine or create better characters later on.

Picture 1: Character design for Introvert and Extrovert.

Comments given that, although I meant to design them as unisex/genderless characters, they were able to 'tell' or categorize them straight away as male or female through the shapes of the head. Round shape looks more like a female and square shape looks like a male. Decorations at the neck lack of rationale, although initially I meant to separate their features to make them look different other than the head shape. However, my lecturer liked the rationale of the Extrovert's 'radar' at the head, but could not relate to the rationale for the semi-heart shape at the Introvert's head. 

Based on those comments and critiques, I'll be sure to refine my character design into something more satisfying the next time.