Hi first of all spot them on place from which they have to start to walk.
If it is ofscreen than spot them ofscreen and put them on layers.
And after this walk them doing the animation :
&ELIAH walks to spot # # # in zone # in # AND ELIAH does it while walk_box natural_loop
@AMARA walks to spot # # # in zone # in # AND AMARA does it while sleep_sit_neutral_loop