Achika appears mostly in her school uniform and the Jurai battle suit, so I will only write about them. I will maybe add more in the future.

School uniform
Achika's normal outfit is the one she has in school. Since the movie is about when she is young at early 1970's, she wears a more traditional sailor suit with a longer skirt than what other girls at her age nowadays wear. It doesn't show her knees and it is in black and a little white.
It suits her very good since her hair is black and her eyes are dark brown.
She has very long hair so she has it tied up in a high ponytail with a red tuft.


Jurai battle suit
She's so cool when she uses her Jurai powers.
Her hair turns into silver/purple and the red tuft disappears.
She gets black pointy marks on her cheeks, exactly the same as Aeka.
Her dark brown eyes becomes red which suits well to her anger at Kain. Achika almost never wears anything colourful, except for the red tuft, so maybe the eyes makes up for it when she transforms...
Anyway, she gets a beautiful kimono in light white, purple, pink and green colours. It suits her so well. She looks cute, beautiful and powerful at the same time.
I think her battle clothes are the best looking ones in the whole Tenchi series (Tenchi's in the movie are horrible...).