Observed spectra (red/blue; smoothed and shifted vertically for clarity, at rest-frame, except for object 5 shown at observer frame; for the two stars we adopted V_rad = −300 km s⁻¹ for M31 from McConnachie 2012) of: 1. 2MASS J00450929+4202393, 2. 2MASS J00471445+4202098, 3. 2MASS J02155016+4806200, 4. WISEA J023648.12+442520.2, 5. WISEA J185756.83+321653.3 and 6. WISEA J212638.33+333212.0. Comparison spectra (black): M3III BS 4463 for object 1 and M4III SHV0549503.dat for objects 2 (Chen et al. 2014), and the SDSS composite quasar spectrum (Vanden Berk et al. 2001) for object 4.