saber (summer memory) (fate)
Saber in one of her alternate swimsuits from Fate/Extella, available as DLC for that game. This swimsuit plus the black bow in her hair make her resemble Saber Lily.
For her other DLC swimsuit from that game, see Saber (Resort Vacances) (Fate).
Appearance
This tag implicates saber_(fate) (learn more).