oooh thank you for the question!
for ronan i love anton lisin (literally every photoshoot he does is genuinely ronan like there’s one where he’s in a church and one where he has a raven on his head??) i like him because he looks equally boy-like and bird-like
for adam i like billy vandendooren or chris overgaard i think they are both very sepia soaked and lovely, but in my head adam is a little more fey-like
for gansey hmmm i have him perfectly pictured in my head, i like cosmin blanariu but like only in those pictures where he has the black bow/tie thing on
for blue i also have a picture of her in my mind that doesn’t match up with anyone, i do like kiko though
and for noah i think dylan forsberg is perfect