On 29 November, Oga announced on his Twitter account that he would receive his fourth 2D costume. On 10 August, Oga debuted his third costume.

On 6 August, hololive's Japanese Twitter announced that Oga and Shien would receive 'Summer' costumes. On 20 July, Oga announced during a stream that he would receive his 3D model. On 13 July, hololive's Japanese Twitter account announced that every HOLOSTARS member would get 2.0 version of their 2D model.

On 21 April, he reached 100,000 subscribers, being the sixth HOLOSTARS to reach this milestone. On 13 March, he reached 90,000 subscribers. On 15 February, he reached 80,000 subscribers. On 17 January, he reached 70,000 subscribers. On 5 January, he reached 60,000 subscribers. On the same day, HOLOSTARS released their cover of Paintër by halyosy, making it Oga's first cover song. On January 3, he revealed his new year's costume. On 25 December, it was announced that all the HOLOSTARS members would receive new costumes on 3 January, 2021, commemorating New Year's. On 6 December, he reached 50,000 subscribers. On 6 November, he reached 40,000 subscribers. On 27 September, he opened up his membership feature. On 9 September, he reached 30,000 subscribers. On 22 July, he reached 20,000 subscribers. His Twitter account was created in 10 April 2020 he made his first tweet on 27 April, his YouTube channel was created on 8 April, and his debut stream was performed on. He is trying to forge friendly relationships with his fans, being sad to notice that after his debut stream, many fans switched from -kun (くん) to -san (さん) honorifics while addressing him, making the comments feel a bit more distant. Despite his appearance, Oga is man of calm and gentle demeanor, speaking with a deep, soothing voice while treating fans very kindly which builds up a warm and calming atmosphere on his streams. He was initially described by other members of TriNero as 'very weird person'. Was introduced to retro gaming and has been hooked ever since. Had recently retired from service and was sightseeing in Japan when he was scouted by Shinove. Ex-military who had been fighting for around 5,000 years in a parallel world.

Aragami oga