According on Yande re, the artists name is Matsuzaki Izumi or Izumi Matsuzaki (In Kanji "まつざきいずみ"), though can't seem to find anything about the artist here or either anywhere, anyone knows?

most likely "the artist" is part of yostar pictures and is the one responsible if not head for turning in-game assets into the anime

Algester said:

most likely "the artist" is part of yostar pictures and is the one responsible if not head for turning in-game assets into the anime

So, should i tag him here on Danbooru then?

Uzimaki-BE said:

So, should i tag him here on Danbooru then?

does danbooru have a strict tagging guideline for anime poster magazine scans? because honestly I'm not sure

Algester said:

does danbooru have a strict tagging guideline for anime poster magazine scans? because honestly I'm not sure

Danbooru is slightly lax with official_art posts in regards to artists including these kinds of magazine scans, though the majority of scans (around 85%) have an artist tag anyway. We can tag it here since we know who it is, so I'll make a tag for her.