This here is how a gentleman acts
Disclaimer: For some reason, Stain's lines don't have an audio file associated with them. His voice works fine for his generic lines, only when it's something specific to Gentle. Please read the subtitles, even if it's a little jarring.
Cute detail: Deku is the only one of the four characters Gentle interacts with who takes him seriously. Even Momo sees him as a bit of a joke, whilst Midoriya honestly knows Gentle is more formidable than he appears.
Music Used (In Order) :
#Love - Supercell (feat. Ann, Gaku)
Professor Sycamore's Theme - Pokemon X & Y