.{0,}([.{0,}])1{0,} (.{0,})?(.{0,})

System.out.println("[NChatBot] Processing chat line: " + msg);
Matcher _m = _namePattern.matcher(msg);
boolean found = false;
while (_m.find()) {
    found = true;
    System.out.println("1: " + _m.group(1));
    System.out.println("2: " + _m.group(2));
    System.out.println("3: " + _m.group(3));
}
if (!found) {
    System.out.println("Can't parse!");
}

String msg = "? ??? [Префикс] Имя ? Сообщение";
Pattern _namePattern = Pattern.compile("(\[[^\]\[]*])\s+(.*?)\s*\?\s*(.*)");
Matcher _m = _namePattern.matcher(msg);
boolean found = false;
while(_m.find()) {
    found = true;
    System.out.println("1: "+_m.group(1));
    System.out.println("2: "+_m.group(2));
    System.out.println("3: "+_m.group(3));
}
if(!found) {
    System.out.println("Can't parse!");
}