This is supposed to be a devil.
The chatter who uses it means they/he/she is up to no good. Probably pranks or something else
^o_o^ is the face
~> is the horned tail
Neko chan chatter:
darn. I forgot i left the key to Liana's room in the lock
Rufio: o rly?
neko chan chatter:
yup
Rufio: ^o_o^~>
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"