: The special confirms that Mantis is actually Peter Quill's half-sister , a secret she had kept since the events of Guardians of the Galaxy Vol. 2 .
: x264mkv , using the H.264 video compression standard inside a Matroska (.mkv) container. Cast and Characters : The special confirms that Mantis is actually
: HDRip , indicating it was captured from a high-definition digital stream . : The special confirms that Mantis is actually
