Lee Gwang-Su (Kor. 이광수) is the artist of popular Korean webtoon, Noblesse. He worked on a manhwa in a collaboration with an author before starting Noblesse, but due to personal reasons, the partnership was dissolved. He recently started another webtoon called Ability with his author friend Son Jae-Ho. Sadly, the series was cancelled after its first season due to his poor health.
His blog can be found here: