Bukaro
I forgot, but it seems Luis never stole a girl from the protagonist by using the "greater good", I mean literally. For example Uesugi Futaro, Sueharu Maru, Itsuka Shido, or other harem protagonists. They make girls fall in love by doing "good deeds". If Luis does better good deeds, they should be stealable, right? I hope the author understands and can realize it. Hero saving beauty doesn't count.