For some reason this one gave me a lot of problems. The All Outfits LoRA is mostly fixed but still has some details.

Still, gonna upload each separate LoRA in case you want to use a specific outfit with no errors (AFAIK).

If you are using the All outfit LoRA then:

If using her first ascension, add "hairclip" to the negative prompt
Her hair in second ascension something looks a bit weird, try adding "sidelocks, hair between eyes" to the prompt
If not using her spare the idle talk outfit, add "tassel earrings" to the negative prompt

Also, either brown eyes or red eyes. Some of the dataset has her with red eyes or brown eyes

Global trigger for all outfit LoRA: YuMeirenFGO

Ascension 1

Appearance: YuMeirenAsc1, brown hair, very long hair, black-framed eyewear, brown eyes, multiple earrings, braided ponytail, single braid

Outfit: black dress, blue bodysuit, ribbed bodysuit, sleeveless dress, layered dress, center opening, black gloves, elbow gloves, turtleneck, strapless dress, sidelocks, black ribbon

Ascension 2

Appearance: YuMeirenAsc2, brown hair, very long hair, straight hair, brown eyes, black choker, multiple earrings, sidelocks, hair between eyes

Outfit: black dress, cleavage, center opening, black gloves, elbow gloves, navel, no bra, bare shoulders, revealing clothes, strapless, sleeveless, black ribbon

Lancer

Appearance: YuMeirenLancer, brown eyes, long hair, twintails, eyewear on head, brown hair, multiple earrings, sunglasses

Outfit: swimsuit, white bikini, off-shoulder bikini, robe, hair ornament, tinted eyewear, front-tie top, open clothes, lowleg

Festival Outfit

Appearance: YuMeirenFestival, brown eyes, brown hair, very long hair, braided ponytail, single braid, multiple earrings, hairclip

Outfit: black sleeves, red scrunchie, cleavage, criss-cross halter, bare shoulders, black choker, ribbon trim, sling bikini top, no bra, bikini shorts, short shorts, black shorts, detached sleeves

Spare The Idle Talk Outfit

Appearance: YuMeirenSpareTheIdleTalk, brown eyes, brown hair, very long hair, braided ponytail, single braid, glasses

Outfit: brown pantyhose, china dress, chinese clothes, panties under pantyhose, blue dress, floral print, print dress, cleavage, cleavage cutout, pelvic curtain, sleeveless dress, tassel earrings, clothing cutout, center opening

Yu Mei-ren (Fate/Grand Order) 5 Outfits - All Outfits