Giving advice and opinions is the easiest task at which I am extremely good.......and never miss.

So here it is for all it's worth......wanted or unwanted......helpful or unhelpful.....you've got it
Firstly......I tend to agree with Eve regarding simpler the better. The focus should be message, Shinhye's picture and the color scheme.These three things should draw everyone in to looking at the banner in detail
It jumps out that way. Bold contrasting colors grabs your attention and make its stand out from all the rest.
Hangul......if you have to add just keep it to the message only. There is no need to add Shinhye's name too since her big picture says it's Shinhye and everyone there will know the spelling too.
Summary:
Her picture only.....no flowers needed but only if it's part of her picture but I would choose just her picture.....close up.....preferably in red since red is a color that jumps out from the banner
The message
Our logo with just PSHIC there
The famous quote holds very true here......
Less is More