Breakdown of Тот, кто надел тот же самый костюм, должен уйти!
кто
who / whoever
должен
must, have to (должен, должна, должны)
тот
that
уйти
to leave (on foot, pf) / to retreat into solitude
Questions & Answers about Тот, кто надел тот же самый костюм, должен уйти!
Why does the sentence use тот же самый instead of один и тот же here?
While both translate as "the same", тот же самый is best used when comparing two distinct objects that are identical in type or appearance (like two identical suits worn by two different people). Один и тот же often emphasizes one single shared physical object. Here, тот же самый костюм clearly means a suit identical to the speaker's, preventing the comical image of two people squeezed into one single suit.
Why does the sentence start with Тот, кто instead of just Тот, который or Он, кто?
When making a general statement about a person ("the one who" or "anyone who"), Russian strictly pairs the demonstrative pronoun тот with кто. Using он, кто is an English habit that sounds completely unnatural in Russian. You also wouldn't use который here because кто is required when the antecedent is a generic pronoun like тот rather than a specific noun.
Is it possible to use одел instead of надел in this sentence?
Grammatically, no. The classic Russian rule is that you use надеть (and its past tense надел) when putting an item of clothing on yourself. You use одеть when dressing someone else. Although many native speakers frequently mix these up in casual speech, надел is the strictly correct choice for putting an item of clothing on yourself.