Useful Brother is a patient from Amateur Surgeon 3 and is the 92nd patient in Amateur Surgeon:Re-Generations. He is a recent member of Hubris's "Useful Brotherhood". He has been used as a test subject for ice ants, therefore he is very cold and is quickly dying from hypothermia. Ophelia makes a deal to save him in exchange for info about Hubris's plans.
Ophelia's Description
This guy has a few screws loose - claims to be part of some 'Useful Brotherhood' and is helping 'Brother' Hubris achieve a greater good...
Hmm hard to tell if he's brain-washed or just really, really dense...-ALAN
Looks like he was being used as a test subject for some sort of ice ant. Not sure how the tools will hold up against these things...
Nippy little nuisances, aren't they? Who knew frostbite could be so literal!-ALAN
Should be able to kill these ice ants like any other parasite, but I'm worried they might fight back...Going to have to be careful...
Can't we just pour antifreeze on these guys and call it a day? That's how it works, right?-ALAN
Personality
Useful Brother is shown as a young man who's a bit not right in the head. However he seems harmless and dimwitted, stating that he has
made a bunch of merchandise for the "Useful Brotherhood" such as T-shirts, stickers, and hats. He is also seen as devoted, for despite everything Hubris has done to him, Useful remains loyal to him.
Procedure
This surgery seems threatening at first glance(in the 3rd game you can even hear the pitter patter of the many ants from outside of Useful.) However if you keep a calm head you can pass it in a breeze. Use the lighter to melt the various frostbite then use the car battery to kill the ants. Try to be quick but accurate(in AS3 missing while frostbite is present may stun Ophelia, rendering you unable to use your tools for a few seconds), then after they are all dead extract them all from Useful's body. You'll have to deal with the ice ants for one more region. Do the same as before, along with mending the star-shaped scar.
Keep note that the ice ants will occasionally create more frostbite.