Very interesting!, in which palace these photos were taken?...in the first one I can see very clearly the two "cat eyes"...lights maybe, or the reflection of something?
In the second one, the "mysterious man" could be a lost tourist (as suggested by you), or maybe a vigilant or an employee of the palace...?...the "transparency" of the figure can indicate that the man (or woman) in question was moving at that moment...in fact I think he/she is walking...
EDIT: I think that she is a woman, If I'm not wrong I think that she is wearing a skirt...