壮壮是一个很普通的超级变种人，他在追寻“人性的精华”（milk of human kindness），这出自戏剧马克白（第一幕：第五景）是雷克斯·古德曼在试图教授超级变种人莎士比亚戏剧时引述给他的。壮壮纯粹地从字面意义上去理解这句话，然后相信如果他能找到并喝下这种牛奶，就能给予超级变种人那种让人类战胜一切的力量。
At the time, Strong's super mutant brothers disliked his appeal to Rex's citation of the play, leading him to his incarceration with the latter. Rex states that they were planning to toss him off the Tower, even taking bets on how many times he would bounce.
他喜欢主角拒绝带比利回家，不喜欢他愿意带他走。这可能是设置错误。他甚至说了：“小小人类应该跟他的同类在一起。那样才对。”同时却显示“壮壮不喜欢这样”。同时他也喜欢主角说比利的父母已经死了。Only trying to convince him once without pushing it can grant a like from Strong and keep the opportunity to complete the Kid in a Fridge quest.
不像以前的超级变种人队友，如马库斯、福克斯或者God，壮壮一点儿都不开化。他经常吐槽人类，念叨着希望超级变种人能占据优势和大屠杀，甚至饿的时候会说他想“吃个人”。He takes pride in his condition and how his super mutant brothers are seen by the people of the Commonwealth as powerful and tough fighters. This is best illustrated when the Sole Survivor chooses to help Virgil find a cure during Virgil's Cure, to which Strong reacts with great disappointment. 唯一区别于他的同胞的是，他意识到，如果他想要变种人和人类一样厉害，他得和人类一起行动，学到他们的秘诀。
For some reason even though Strong will say that some day all humans will be destroyed he likes it when the Sole Survivor helps settlers.
Strong can sometimes be seen interacting with the large cooking pots present in some super mutant camps (unusable to the player), stirring the pot and tasting its contents.
Although Strong refuses to actually enter a pillory if assigned to one, the player character will still get the trophy/achievement Time Out for the act of assigning him to it.
Should the player character choose the dialogue option of "I don't have time for a dick measuring contest, what do you actually want?" while first talking to Ronnie Shaw, Strong will comment with "Measure what? Strong Confused." This confirms that when transforming into super mutants, they lose their genital areas. Something that can also be read in Fallout 3 in Vault 87 on the head physician, Wayne Merrick's terminal, in the test labs.