Plotina was the wife of Trajan.
Only one sestertius reverse type was struck in her name with 2 different obverse legends. The reverse depicts Fides, the personification of Fidelity or Faith. This reverse illustrates the high regard Trajan had for his wife. Fides is depicted holding corn ears and basket of fruit. All coins of Plotina are extremely rare.
From the Matthew Sersch Collection
obv : PLOTINA AVG IMP TRAIANI
rev: FIDES AVGVST SC
RIC 740, Banti 1, BMC 1080
RIC 741(Banti 2)--obv. legend PLOTINA AVGVSTA IMP TRAIANI