if you channel a hole in the roof of a room from above you can designate it as a pit/pond with i, and when you tell dwarves to dump barrels of nearby food/booze they will throw it down the hole. if you unforbid it then your uberdwarf girl can use it. same with items like armor and furniture and stuff. you could give her her own bedroom somewhere outside. make it floodable so that if other migrants dare to try sleeping in her room you can discipline them.
also, here are the personality traits page on the wiki.
http://www.dwarffortresswiki.net/index.php/Personality you will notice that the one she has is an extreme personality trait that only occurs in dwarves with a very low level of sympathy. there is an even less caring trait in the same line, " Would never let an objective judgement be tempered by mercy or pity." i can recall one of my hammerers having that.
i screen recruits for negative personality traits now, as ive had a few champions tantrum or suicide over really minor things like their first injury, because they had very rare traits like "Is frequently depressed." i also had a mayor once who had the trait "is in a constant state of internal rage" and during the several times she tantrummed because of all her cats dying she killed a few champion plate wearing guards, and eventually ended up locked in my prison on the end of a chain, completely insane and attacking anything that came near, including her own pets. other interesting things are dwarves with traits like "Dislikes helping others" will get a negative thought from helping a wounded dwarf. personality is pretty neat now and toady has mentioned dwarves acting more upon such traits, like messing with other dwarves they hate.