Is this behavior from a toddler normal?

My dad and his new wife brought their 2 year old granddaughter to my house yesterday to have a play date with my son of the same age. She babysits her once/week for the day. I have never met her (the granddaughter) before but when they got my house the girl took my hand and wouldn’t let go. When her grandma tried to take her back she would flip out. I asked my dad if she turned 2 yet and he didn’t know but then said well she must be 2 because she had a birthday party, I asked how was it and he said idk I didn’t go, I can’t go to all of these things 😢

I understand some toddlers are just friendly but this was weird to me bc of how she reacted to the grandma. Grandma is super frazzled and calls her a bad baby, etc. despite watching her just once/week. Is this normal behavior for a toddler? I have other nieces and nephews and it seems off to me.