She has strong feelings for Terra, and Ventus for that matter, but they're nothing more than close friends. We know this is certain, as said by Tetsuya Nomura. (Story Creator/Character Designer)
Nomura has stated that no in-game relationships will occur in the Kingdom Hearts Universe. Any couples or romantic involvement is strictly fan-made and does not pertain to the actual story/events of Kingdom Hearts.
Yes, on destiny island she also met riku.
Aqua is about 16
there isn't a kingdom hearts 3 aqua is in birth by sleep
It's still unknown what exactly happened to Aqua after the ending of Birth by Sleep, it will probably be revealed in Kingdom Hearts III.
yes
no she only appears in birth by sleep but she may be in kingdom hearts 3
She is a Female
Wilma Holland.
2 of the main characters in kingdom hearts birth by sleep and birth by sleep final mix
Aqua wields a keyblade known as the Rain Fall.
aqua saved kingdom hearts because she fought terranort which could still have a chance of commanding kingdom hearts
terra, aqua and ven, keyblade masters in birth by sleep
no you play as 3 characters Ventus (Ven) Aqua Terra and its no kh3 its kingdom hearts birth by sleep