I had a better idea of something to do, I'll RNG 12 characters...


Now, if we take the first 12 numbers, and discount duplicates, and put them into the character order , going Reimu- Marisa - Remi, not Reimu- Remi - Patchy, we get:
Marisa, Renko, Yuuka, Keine, Ran, Rumia, Youmu, Aya, Minoriko, Maribel, Kaguya, Suwako
... Interesting. I have buffs [Ran and Keine!], utility, and healing, but there is no real tank. Keine is about as close as I get, and she's hardly a slot 1 tank.
Since I have Marisa, and Suwako for NTR damage, I might actually build Yuuka for Slot 2 tanking. She does have a good HP and very good DEF stat, even if her MND is somewhat average, and her leveling is slow, it's better than anyone else. Tank Ran also seems to be on the cards.
Main damage would be Youmu, Kaguya, Suwako and Marisa, it seems.
How would you suggest building a Slot1 Tank Keine? [I don't exactly have other options for a Slot 1 tank here]