https://www.pixiv.net/users/3094446
https://www.pixiv.net/stacc/bluebullpen
https://twitter.com/BlueBullPen
https://twitter.com/intent/user?user_id=2431528668
https://www.deviantart.com/bluebullpen
https://sketch.pixiv.net/@bluebullpen
https://bsky.app/profile/bluebullpen.bsky.social
https://bsky.app/profile/did:plc:zdtuuhr5qpn3ycsykfpk3vpi