Constructive Criticism Mello & Near from Death Note

[NikiFig]

So my VN is a fangame based on these two -here are some of my pieces. Please tell me what I can do better.

I am using Adobe Photoshop CC.

The multiple Mellos and rough sketch of Near are for my sprites.

https://ibb.co/dc1zdF
https://ibb.co/eytqkv
https://ibb.co/jOiZCa
https://ibb.co/cjmXyF
https://ibb.co/mciO5v
https://ibb.co/ks3qkv
https://ibb.co/if1XyF

Thank you for all the time you're putting forth to look at and review these!