Your character? Felicia (maidhem)
Your character's aura? Of course Sanji can sense it. Felicia feels she has nothing to hide and makes no effort to do so. Her aura would be strong and vibrant, not unlike the sun on a cold winter day, but it may fluxuate when she's emotionally distressed. There's nothing ominous about her at all.
Your character's weaponry? Felicia carries at least two throwing knives on her person at all times, typically hidden in her clothes or the back of her boots. They're nothing special, just ordinary steel knives. However, Felicia does have some magical staves that may have an aura that is noticably... Magic. They're ordinary items by Fire Emblem standards, but not so in other worlds-- and currently she is the only one who can use them in game.
Your character's emotions? sure! Felicia wears her heart on her sleeve!
Power warping? As long as Sanji doesn't mind getting a little frosty sometimes, sure!
Flirting/Womanizing? Go for it. Felicia is canonically a healer-- even with her powers warped, she would try to help.