Philip
Hard worker, takes schedules and work very seriously. Practice, practice, practice. He and Clarence have a lot of pair choreographies and aggressive songs they sing as a duet. Despite his personal problems with Clarence the two are inseparable at rehearsals and on stage, and they work together so seamlessly that it's almost eerie. Usually the one who yells at Alexander for being an insensitive prick (only away from cameras, though). Has had awkward post-tour drunken make-outs with Daniel; they both pretend it never happened, despite photographic proof. Loves cinema and spends most of his disposable free time watching movies.
Clarence
Has that raspy smoker voice that makes him good for angry, angsty songs. Packing a lot more existential dread and self-loathing than he lets on. Mortally afraid of being alone, probably has some serious abandonment issues. He has piercings and a tattoo or two (or more), despite their contract forbidding that. No one knows what the connection between him and Philip is, whether they're related, childhood buddies or something else, but they always seem to end up hanging out together anyway (and somehow look a little alike, too). Has definitely beaten up paparazzi before and cussed at interviewers.
Daniel
Daniel is seen as the smart and studious guy by their fans. He's fluent in several languages and if a non-English cover is made of one their songs, he's usually the one singing it. Wears his glasses a lot in promo photos and shoots for the Aesthetic. Usually the one to do all the sexually provocative dance moves. In general a freak on stage, more aggressive and wild than in private. Doesn't always remember everything he does while on stage (adrenaline-fueled amnesia) and is all “????? did I really do that?” when watching the footage later. Besties with Simon and secretly a huge nerd. Gets along with everyone pretty well, goes to the gym with Philip and Clarence. Often covers up for Alexander after he's blurted out something weird again.
Simon
Tries. Tries so hard. Someone please help him. Was in a near-fatal accident before the band thing happened, but doesn't talk about it much. Philip and Daniel are constantly worried that he's gonna die from stress or something, so they act like a pair of dysfunctional parents and go out of their way to look after him (which is usually hilarious as they can barely take care of themselves). Tries to get along with everyone to his best ability. Embodiment of Nervous Laughter™. Probably into tabletop RPGs. Has the cutest smile. Looks like he walked in on accident.
Alexander
Alexander tends to act so aloof and unaware of how insensitive his remarks are that the other boys started referring to him as Space Alien as a joke, because he doesn't really fit in and acts so strange that he “might as well be from another planet”. In reality, he's very intelligent, eccentric, and spends so much time immersed in his special interests that his people skills have taken the back seat permanently. Daniel turned it into a pet name eventually, also calling him Star Child, Space Man and other similar names. Alexander doesn't show it, but he actually kind of likes the nicknames (only when coming from Daniel though).