Trouxas (como a mãe e pai ) pode ir para a plataforma, presumivelmente da mesma forma que magos e bruxas são capazes, através do gateway mágico.
And the scene reformed. Harry looked around: he was on platform nine and three-quarters, and Snape stood beside him, slightly hunched, next to a thin, sallow-faced, sour-looking woman who greatly resembled him. Snape was staring at a family of four a short distance away. The two girls stood a little apart from their parents. Lily seemed to be pleading with her sister; Harry moved closer to listen.
‘… I’m sorry, Tuney, I’m sorry! Listen –’ She caught her sister’s hand and held tight to it, even though Petunia tried to pull it away. ‘Maybe once I’m there – no, listen, Tuney! Maybe once I’m there, I’ll be able to go to Professor Dumbledore and persuade him to change his mind!’
Harry Potter and the Deathly Hallows — CHAPTER THIRTY-THREE — The Prince’s Tale
Em circunstâncias normais (por exemplo, quando o trouxa não é acompanhado por um jovem bruxo ou bruxa) e eles notam alguém usando a entrada, suas memórias são simplesmente apagadas
There are usually a number of plain-clothed Ministry of Magic employees on hand to deal with any inconvenient Muggle memories that may need altering at the start and end of each Hogwarts term.