Why is the Admiral dressed like that?  

Aren't they all supposed to be in uniform?

Oh, she's retired.

Powerful people are just a little creepy by nature.

(With the exception of Picard.)

(Captain's Ready Room scene:)
I jsut think it's weird for Picard to be so trusting.  Shouldn't
he be on guard for this kind of thing?

"When we confront Jidan, I want you to conduct the interrogation."
Already that's a little creepy.  This smacks of Nazism, of the SS.

"Captain, I predict that officer will be very valuable in this
investigation."  (i.e. She knows he can be manipulated.)
Very subtle stuff going on here.

She is appealing to people's lust for power is basically what she's
doing.  Manipulation of people's baser instincts to get them on her
side, to get them to serve her.

"Why lie now?"

The real question is, why have her get an accused Klingon officer to lie
about something else? 

what is her motivation?

"My fahter taught me to avoid partnerhsips ... most of them can be
woefully one-sided --"  Ah, some backstory coming out.

"I always preferred working alone.  Tha way, if something went wrong,
I didn't have far to look for the cause ..."

This is actually very noble.  It itself is not bad.  Kind of a hole
here, why they would include this and not tie it to what is off
about her.  How this went awry.  Kind of like how Lucas took no
effort in really writing a story about Anakin's slide into hell
internally and being Darth Vader.

She is lashing out at everyone because of grief about
her father.  She has an inflated sense of carrying out what he
did to the point of psychopathy.