Liara's CE Armour without forehead plate and as casual wear, a copy&paste DLC MOD version. For casual wear Please use either one of these: DLC_CE_Liara / DLC_CEL_Grn / DLC_CEL_Blue

made several versions what can be installed as Liara's casual outfit, installed over BioH_Liara_00_NC.pcc file (or perhaps over BioH_Liara_00.pcc for combat) with ME3Explorer's TPF tool.