I like to think if Kiragi transforms for the first time he'll be all super excited and be running around in circles like a puppy, while Takumi is panicked because oh my god my son is a dragon and this is before Corrin and Kana saw this.
Kiragi would NOT stop running around and testing his abilities! Trying to fly with his wings and breathing black fire and Takumi’s just there freaking out and he doesnt know what to do at all? where’s corrin when you need her?? get the poor child a dragonstone?? and YES HE’D BE LIKE A PUPPY?? running around like LOOK AT ME PAPA IM A DRAGON!!! he’d be non stop dashing around, laughing!! an absolute cutie and a dork at the same time. Corrin would just laugh and be absolutely in love with her son because he takes after her!!