I noticed an interesting post in JJBA community about Rohan and Daiya.
"Both Rohan and Daiyas stands are able to take memories away from their target (Rohan would literally rip out a page from the victim's soul).
Both fights took place at the stand user's place.
Both Rohan and Daiya didn't truly had bad intents against their opponents. Rohan wants to study Koichi as an inspiration for his manga, while Daiya is attracted by Gappy.
After the fight, Rohan became a good friend to Koichi while still holding a grudge to Josuke. Daya, on the other hand, will keep being very jealous of Yasuho I guess.
Also (although this might be a bit far fetched), both Rohan and Daiya only lose the fight because of a mistake of their own from being on the verge of winning: Daiya opens up the fride, while Rohan makes fun of Josuke's hair-style.
I wonder if Daiya will ever be able to implant memories into her enemies like Rohan did."