Unfortunately I'm not an artist so I chose the lazy way by fusing the mascot with the logo.
Wait, don't run away yet, because it ended up making sense.
Here's a short interpretation summary:
There are three ways to view the logo/mascot.
[ol]
[li]As a bare logo. The top half represents the letter m which stands for manga obviously.[/li]
[li]The top half can also be viewed as an open book. The smaller the logo gets the more it appears to be a book or a manga page with panels.[/li]
[li]The robot face as its main characteristic. I'm sure the eyes will be interpreted differently, but they're supposed to depict closed eyes of a smiling facial expression.[/li][/ol]
The color is discussable. I simply went with the link color of the light theme here and was quite satisfied with the result.
Intro
Mascot/Logo
Banner
@
Zephyrus