iris who? do you mean that girl who wanted to be model?
anyways you can get to good graces with rm even w/o sending single girl (besides kira) there.
To advance RM we need to send girls there.
- To unlock Charlotte we need to send one girl.
- To unlock June, Vika, and deeper content with Sakura, like visiting her house and hearing her story, we need to send two girls.
- To unlock content with the other girls, Lisa, Lexi and Nina, we need to send three girls. (I'm not sure about this one, but how you treat Monica, Quinn, and Rachel is relevant to whether these girls like you and have a scene with you.)
ah, well she rarely gets screentime. not sure if rm accepts grown ups there (alice was exception since she needed money).
Monica, Alice, Quinn, Melanie, Kira and Kimberly are already in Red Maiden, why wouldn't Sakura accept Iris when she looks younger than half of the others?
If they accept Monica, they cannot refuse anyone.
The game is still in development and should have more than a hundred characters, screen time per individual is not important at this point, considering the quantity, I think the dev has even been generous with these
secondary characters.