Very complex P-Cygni profiles of the first Balmer lines seen in the spectrum of LHA 120-S 35 on a velocity scale relative to V _sys = 308 km s⁻¹. The spectrum in red dash-dotted line was taken at LCO in 2008, while the ones in black solid, cyan dashed and green dash-dotted lines correspond to the observations acquired at ESO in 2014, November 2015 and December 2015, respectively. In the Hα plot, we also included the spectrum acquired at CASLEO in 2012 in magenta dashed line. This colour coding will be used in the rest of the plots. The central absorption of the double-peaked emission component of the Hα, Hβ, Hγ and Hδ lines is at ~−25 km s⁻¹, −17 km s⁻¹, −13 km s⁻¹ and −11 km s⁻¹, respectively (indicated by a vertical dotted line).