ANA seating children

[Snowman_ROK]

Hi - flying to SYD with ANA next week and looking at whether to pre-purchase seats for the family on what looks like a busy flight (JYN 2,500 each).
We have a 11 yr old and a 12 yr old - does anyone know if ANA would seat them with one of the adults, or if they would assign them random seats?
Thanks

 

[cosi]

For AUD$30 I will pre purchase seats.

The ANA Chat window on the ANA web site is very good