Ne/Si: soft, naive, darting eyes. Si shows as a concentrated scowl in which the outer edges of the brow move downwards.
Se/Ni: penetrative, staring, wide eyes for Se. Ni looks to the side and zones out, looking through objects. The top eyelids of high-Ni users will fall down slightly, giving them a 'bored' look.
Ti/Fe: neutral face, receding energy, momentum halting and looking downwards for Ti. Emotional swells in voice and articulation for emotional impact (not at all blunt like Te), and wide smile for Fe.
Fi/Te: soft, airy voice, muscle tension in facial area around the nose and looking downwards for Fi. Blunt articulation, snippy headnods and shrugs, monotonous speech for Te.