johto4 body language notes:
Ethan - very loose demeanor, takes up a lot of space (wide stance, manspreading, hands on hips). uses big gestures to include people in conversation such as pointing or waving at people when talking to/about them. Typically very comfortable with entering others' personal space. Can be touchy with friends/family, especially light roughhousing (punching shoulders, ruffling hair, etc.).
Lyra - a lot of hand gestures, especially hand-to-face (covering mouth when surprised, steepling hands when pleased, resting hand on cheek when touched/embarrassed). Usually clasps hands when not using them. Always moving/shifting in place. Almost all facial expressions include a smile regardless of mood.
Kris - hands usually in front of body (crossed arms, holding something, hands in pockets) but keeps a relaxed (but not loose when in a lab/professional setting) stance. Stands upright but not uncomfortably so. Most nonverbal communication occurs with upper body such as exaggerated expressions, pointing with head, shrugging with both head and shoulders. Gets visibly tense when trying to hold her tongue.
Silver - tight stance, may or may not be tense depending on setting/mood. Either arms are crossed or hands are in pockets, not much variance. Very expressive and aware of it, will often attempt to look away or otherwise conceal his face when trying to hide something. Will puff up when angered (set shoulders, lifting face to look down at people, but still keeping arms close to body). Brows are usually furrowed regardless of facial expression.