Mukuro Rokudou (KHR) There's a shimmery veil of illusion on him at all times. Most of the time it doesn't obscure much - mainly his right eye and certain parts of his body. If he's hiding, the illusion will be more concentrated but Leo will be able to see past it to whatever he's concealing. If he's fighting, the illusions will be a lot more indiscriminate and blanket the entire field (and then some).
Mukuro's "true form", if it can be called that, is someone with faint surgical scars around his right eye, a barcode tattoo on his hip, and another foreign tattoo on his right arm (leftover from the previous cycle).
'True name': Leo will know that 'Mukuro' isn't his real name. Leo will also know that if he dares say it where anyone can hear, his life might be cut drastically short.
Murtagh (Inheritance Cycle) There is nothing unusual about him other than the empathic link between himself and Thorn. If Leo can see such things then that's what he will notice.
All of the dragons have some kind of orb-like item sitting in their chest (their 'heart of hearts') which probably appears as light. Might be hard to see though since the dragons are intensely magical creatures. If, for whatever reason, they regurgitate Heart of Hearts (yes, it's physical) then they simply appear as intensely magical, albeit linked to that orb.
'True name': Unknown, but he has one and Leo can absolutely see it. This name is written in his canon's Ancient Language and can change if the person undergoes a thorough change of heart (for better or worse).
Kaito Kuroba (Detective Conan/Magic Kaito) He is an absolutely normal human being. Stop perving on him! (Carrying an awful lot of items hidden in his clothing though.)
Shougo Makishima (Psycho-Pass) See above. (He is not concealing any items on his person.)
Mukuro, Murtagh, Kaito, Shougo
There's a shimmery veil of illusion on him at all times. Most of the time it doesn't obscure much - mainly his right eye and certain parts of his body. If he's hiding, the illusion will be more concentrated but Leo will be able to see past it to whatever he's concealing. If he's fighting, the illusions will be a lot more indiscriminate and blanket the entire field (and then some).
Mukuro's "true form", if it can be called that, is someone with faint surgical scars around his right eye, a barcode tattoo on his hip, and another foreign tattoo on his right arm (leftover from the previous cycle).
'True name': Leo will know that 'Mukuro' isn't his real name. Leo will also know that if he dares say it where anyone can hear, his life might be cut drastically short.
Murtagh (Inheritance Cycle)
There is nothing unusual about him other than the empathic link between himself and Thorn. If Leo can see such things then that's what he will notice.
All of the dragons have some kind of orb-like item sitting in their chest (their 'heart of hearts') which probably appears as light. Might be hard to see though since the dragons are intensely magical creatures. If, for whatever reason, they regurgitate Heart of Hearts (yes, it's physical) then they simply appear as intensely magical, albeit linked to that orb.
'True name': Unknown, but he has one and Leo can absolutely see it. This name is written in his canon's Ancient Language and can change if the person undergoes a thorough change of heart (for better or worse).
Kaito Kuroba (Detective Conan/Magic Kaito)
He is an absolutely normal human being. Stop perving on him! (Carrying an awful lot of items hidden in his clothing though.)
Shougo Makishima (Psycho-Pass)
See above. (He is not concealing any items on his person.)