This is Running Antelope or Tȟatȟóka Íŋyaŋke of the Húŋkpapȟa Lakota tribe. It appeared on a 1899 five dollar bill.
He's portrayed as wearing an Indian peace medal.
(photos of all currency that includes his image)
This is the depiction from the Sacagawea dollar.
The Black woman is Harriet Tubman, who had been scheduled to appear on either the $20 or $10 bill, but she hasn't yet appeared on any currency. The drawing is probably derived from this 1908 photograph, that was captured by Tarby Studios in Auburn, NY.