[14] In June 2022, she was cast in a supporting role in the tvN hit fantasy period drama Alchemy of Souls.

[15] On May 15, 2023, SPOTV News reported that Arin would be starring in tvN's short-form drama Summer Love Machine Blues.

[19] In December 2021, she collaborated with Clarins and World Vision International in order to deliver Christmas gift boxes to low-income families.

[22] On August 11, Arin donated ₩20 million to help those affected by the 2022 South Korean floods through the Hope Bridge Korea Disaster Relief Association.

[26] In June 2022, she was selected to participate in Pepsi's promotional single "Blue & Black", a collaboration song between Oh My Girl's Hyojung and Arin, Ive's Wonyoung and Leeseo, and Cravity's Serim and Jungmo.

[28] In August 2023, she was selected as an advertising model for the South Korean mobile MMORPG Luna: Moonlight Chronicles.