I think I'd probably want a different summon. A giant white dragon with thought process similar to a human would just feel too heavy to direct. Even if betrayal was impossible, I don't think I could trust something that powerful.
But it was male. That in itself for dragon after transforming is somewhat rare (unless they're a lot more common with female MCs, I don't read a lot of those)
Must... contain... eyeroll... to humanly... possible... levels... NNnnnope can't do it, they rolled so hard I severed my optic nerves. Thanks a lot, guys.