Dandadan ISTPs

according Personality Database at the time of writing

Seiko Ayase - ISTP - 9w8
https://dandadan.fandom.com/wiki/Seiko_Ayase

Unji Zuma - ISTP - 8w7 
https://dandadan.fandom.com/wiki/Unji_Zuma

 

Fairy-Tale Card-possessed Umbrella Boy form fullpower
(FTC possessed Unji using Unji's hatred/anger) 

Imotako Kur - ISTP - 5w6 (New in PDb)
https://dandadan.fandom.com/wiki/Imotako_Kur

Personality switch

Ken "Okarun" Takakura - INFP

> "Turbo Granny Mode" Okarun - ISTP - 9w8