Ghost was used to dealing with all kinds of bullshit a day to day basis; it was part of his job. Terrorists, cartels, all the other scum of the earth - not an issue. The walking dead, though? That was new. He'd kept to himself, since then. Safer. Less variables. Easier to survive that way, with no one holding you back. So when Ghost had found himself trapped in a residential high rise during one of his trips into the city, he hadn't been happy to realise he wasn't alone.