According to Emiko's SimDNA in SimPE, her hair was black before it turned grey. According to her age data, she had 10 days left in the elderlife stage when she died. Emiko uses the 8th Maxis face template in Create a Sim, except the eyes are closer to the forehead than on the default template, and the ears and nose use the 10th face template. Also the jaw is longer than on the default face. However the jaw is only longer on teenage, adult and elder females, which may mean that the jaw was genetically passed down, as this oddity generally only occurs on Sims whose facial features were genetically passed down.
Emiko's SimDNA in SimPE shows that her recessive alleles are for red hair and light blue eyes. Unlike several other married ancestors from Apartment Life who have memories of their spouses, she only has Mystery Sim memories. However Emiko still has memories of giving birth to Etokas, and meeting her grandchild Etsu.