It may not be really accurate or anything but I saw this on a website so I just translated it ^_^
The Oh-chan that they saw: (1) Not the type who checks himself in the mirror all the time. (2) Very silent and alone until Nino came talking to him, then he will play with Nino. (3) Will sit on the sofa and stares into space. (4) Even when Arashi are not filming, he will get bullied by the other members.
The Sho that they saw: (1) Always very seriously reading the scripts. (2) Consistently checking the mirror to arrange hairstyle. (3) Constantly became very happy (Tension Up!) when he saw Nino and Oh-chan playing. (4) Sometimes bullies Oh-chan.
The Aiba that they saw: (1) Can hear his laughter almost everywhere. (2) Always the latest to change his clothes. (3) Read alot of magazines. (4) When he watches TV, he will explain all the currently popular stuff to the members.
The Nino that they saw: (1) Will greet every single staff. (2) Always playing games. (3) When he is feeling bored, he will go to Oh-chan there and play with him. (4) When he is feeling happy, he will appear to be the most excited of all.
The Jun that they saw: (1) Very sensitive to the smell of perfume. (2) Always encourage Nino and Oh-chan to play. (3) Receives alot of calls!! (Always on the phone)