You could get a small (~10x5x5cm) breeding net that hangs on the rim of your tank, giving the youngster protection from the other fish.
As for food, if the fry has already used up the yolk sac, you will need someone else with experience of breeding your fish to chip in. I've raised two batches of Pearl Danios and one batch of Golden Wonder in such a net, but because of their relatively big size, I could get away with Tetramin and crushed Tetra Prima, but I have no idea if you may need some "liquifry"or alike to feed a smaller fish.