Pterodactyl
Plus on block.
1. I'm black, that doesn't mean I can't be racist, but I didn't assume it was his daughter just because she was also black.It was never said Jax doesn't have any kids, but more importantly it could just be another black person who works at SF you racist fucks.
2. I'm assuming every young character that is seen with an established character of the same race is their relative in some fashion, like I did when assumed Takeda was Kenshi's son before it was stated, even though people disagreed and jumped to other conclusions. Hell, she could be his niece for all I know. Boon said we should expect more legacy characters besides just Cassie and we haven't had any solid confirmations since Cassie, so i'm going to make educated guesses as to who might be what.
If it were a picture of Baraka training with an other Tarkatan, or Kung Lao training with another ambiguously Asian character that is much younger than him, or Nightwolf hanging with a younger Native American character, i'd jump to the same conclusions.