Hi, first time reviewer here
This piece has got great control of everything on the technical level - the psychic aesthetic uses vibrant, almost trippy colors, and the linework/shading are great, with room to improve (though that's true of everyone). The psychic stream on the left arm looks especially impressive!
My only qualm with the piece is the posing (though now looking at your profile description, you're probably already aware). The first thing I noticed was that Mob has clenched fists. In the context of him being an ESPer, clenched fists would be out of place, as he never really looks like he's physically struggling to use his powers, or at least in casual situations like this. The right hand having its palm side facing up and the sharply bent leg also look rather uncomfortable, making him look tense!
My recommendation would be to practice drawing characters in realistic, loose poses, perhaps taking extra care to study hands to eliminate any tendency to fall back on clenched fists
Good luck!