I absolutely love typing characters with their MBTI so I decided to try it out with Bandori characters! I'll do it by band so I'll start off with my favorite band: Afterglow!
Ran is definitely an artsy type as a lot of her character is based on trying to express herself. I have no doubt that she is an introvert (especially seen in the As Evening Clears event). She also seems like the type to defy expectations especially in terms of family which explain the rebellious streak of her personality.
Moca is a little difficult because her apathetic attitude may be the sign of a thinking type but based on what's given about her inner thoughts really makes me lean towards a feeling type. She's a very go-with-the-flow type who's passionate but won't always show it and when she does, it's only to a small group of very close friends (this is probably why she a little more outspoken with Afterglow than with other friends such as Lisa or Saaya).
Himari is probably the most extroverted out of the group as well as the expressive. She's clearly altruistic and puts others before herself (hence why she's a bit of a pushover especially to Moca). This also makes her more hungry for approval from her band mates and seems like she relies on them for her self-esteem (this may be speculation on my half however). She is also the planner of the group, making her more of a judgmental type.
The most notable trait about Tomoe is how straight forward she is. She's the one to address someone's unusual behavior and will be the one to bring up any tension that needs to be resolved (which as seen in the band's main story causes conflict with Ran's reluctance to show much emotion). She's definitely the most logical in the group which Ako likely finds admiral (a trait strongly valued by members of Roselia) and is more direct.
I was really unsure whether or not Tsugumi should be considered an introvert or an extrovert but I decided that based on her interactions outside of the band shows that she's more motivated by social interaction (ex. working at her family's cafe, student council). Her selfless nature is definitely a trait of a Feeling personality type. She's also the least likely to be rebellious and is very rule-abiding in general which gives balance in the band with Ran's more progressive personality.
Thanks for reading! I put a lot of effort into this, and I hope to cover the remaining bands soon! If you disagree, feel free to leave a comment! I'd love to hear other opinions!