I've seen her blow bubbles and there are a few bubbles right now floating on her tank. Does she look feminine or masculine, well really not that familar with bettas but she has clearly a different body type then Jabi. Yes, she has done something that looks like flaring. Vertical yes she most defently does have vertical stripes; kinda like tiger stripes. Below is the image from the eighth but her tail has grown since then, and she turned a bit more blue.
lOoking at these picks jer top fin as grown too (you know the fin jaws sticks out of the water). 0_o but her lower fin looks the same.