A known Genshin Impact leak source has recently suggested HoYoverse will give Dori to players for free during the RPG's version 3.2 update
Genshin Impact Leak Hints at Free Four-star Character in Update 3.2
Version 3.0 Character Details: Dori : r/Genshin_Impact
Genshin Impact 3.2 Banner and event details, all star tower defense banner
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Genshin Impact 3.2 Banner and event details, all star tower defense banner
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Genshin Impact 3.2 Banner and event details, all star tower defense banner
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Genshin Impact Leaks: Dori Could Be a Free Character in Version 3.2
Fabulous Fungus Frenzy Event + Free Dori via Genshin Intel : r/Genshin_Impact_Leaks
Genshin Impact 3.2 Banner and event details, all star tower defense banner
Genshin Impact – News, Reviews, Videos, and More
3.2 Official Banners : r/Genshin_Impact_Leaks
How to get free Dori in Genshin Impact 3.2 patch