how do u say "Hi"?

Mostly, people wave (mildly) at ya and say, "Hi!" or "Hi.". Some just grin or smile or nod e japanese nod.

Not for Rachel. She wandered into the room & saw me. Immediately, she hastened her pace, as though she has made a wonderful discovery in the room, sat down next to me (I was sitting on the floor), wrapped her hands around my arm and said, "hi..."

Warmed. Loved.

Some "Hi" indicate the "beginning" of a time 2 or more will spend togather or is it a brief courteous act?

Rachel's "Hi" simply says "I'm so glad u're here. I'm so happy that I'm here with you".