Otoi mentioned that Tsukushi is quite the hardcore gamer, but Tsukushi himself downplayed it, stating that it's not as extreme as it sounds. Besides Genshin Impact, he previously played a game similar in concept to Made in Abyss called Notia.
As for why he loves Genshin Impact, it's because there haven't been any new games in the style of The Legend of Zelda: Breath of the Wild. In Genshin, players can explore wherever they want, gradually upgrade characters through the stamina system, and it provides a different take on open-world and action RPGs. As a side not, Tsukushi had many praises for The Legend of Zelda: Breath of the Wild during the interview.
Returning to the topic of Genshin Impact, Tsukushi mentioned that, compared to adventure and exploration, the game focuses more on character development. He finds it fun to experiment with combinations of elements like fire and water when forming teams rather than emphasizing combat physics.
Of course, the most critical aspect for him is being able to control a cute character with a backpack while exploring the world. He then showed off a Klee model that he bought on Yahoo! Auctions, expressing the risk of encountering counterfeit goods but fortunately he got an authentic one.
He also shared that the main characters and teams in his gameplay are all designed around Klee. Furthermore, he also mentioned Klee's Japanese voice actress, Misaki Kuno, who also voices Faputa in Made in Abyss: The Golden City of the Scorching Sun, and praised her loli voice as a true treasure of humanity.