Determine the valence intensity of the following tweet, considering the mental state of the author. Assign a real number between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Tweet: 'This one?' \n'A bit odd looking isn't he? Pointy.' The alien asked. \n'Perhaps. But he'll be #wonderful. He's from the Steve pile.' #vss365