Aliasing matotoma → matomonstera
Link to alias

Reason:

matomonstera is the twitter handle for mato (matotoma). matotoma is the current e621 tag for this artist, but none of his main sites (furaffinity, pixiv, twitter) uses this name. I think mato_(artist) would be okay too as this is the romanized for of their Pixiv name, but matomonstera could be more appropriate since it is already written in the romanized form on their Pixiv link to their Twitter. His FA handle uoze could work too, but I thought relating the handle to their Pixiv account would be better since Pixiv preserves image quality while FA does not.

Comparison of works:
https://www.pixiv.net/member_illust.php?id=303305
https://twitter.com/matomonstera/media

EDIT: The tag alias matotoma -> matomonstera (forum #255923) has been approved by @Rainbow_Dash.

The tag alias matotoma -> matomonstera (forum #255923) has been approved by @Rainbow_Dash.