I've been doing Sengoku High on four characters in Reboot: Hero, Bishop, and two Kannas. All using a Big Spider familiar and no other drop buffs.
Both Kannas consistently get 75-76 coins per run (76 is the maximum).
The Hero gets 67-70.
The Bishop died a couple times, so I don't have an exact average per run, but it definitely misses more than one coin per run. It's too low level to have the HS drop rate hyper.
I've tried looking at Kanna's skills, but couldn't find anything that says it increases item drop rate.
Anybody know anything about it? Or can offer counter-examples?