Welp I don't exactly know the plot progression from here on to say much but my two cents:
-If you'd rather let Yasukazu be taken out with Sarah, it'd be nice if you can extend it a bit [as in, taken to a diff room to connect or to be experimented on [s]or was called to entertain people with juggling[/s]]. Else I'll just write whatever to follow on from where you left off to regroup with the others in the DgtWld [if that's okay with you].
-If you think the above is too much of a hassle, edit so that Yasukazu is left in the room with others to connect to the DgtWld