E Piano: The main one sounds like a Rhodes or Wurly sampler run through EQ, Distortion and a Delay.
Voice-ish: In the same range, playing the same (or similar) notes sounds like a synth with either a vocal wavetable or a formant filter. It has a kind of “oh” shape to it. It too sounds kind-of lo-fi so some EQ and light Distortion.
Twinkle: Up high is a synth. It sounds like an arpeggiation playing a series of notes really fast. Probably a simple patch, as once you play sounds that high, they start to sound similar to each other. I’d start with a Saw, toss on a Delay, and go from there. Maybe a touch of Unison, maybe a subtle small Reverb.