Jackson has short, dark fluffy hair. Sickly/ghostly pale skin. A cotton eyepatch. Four arms and a black turtleneck sweater. 

He acts cold towards strangers, but opens up as he gets to know them.

Jackson doesn’t know about any modernised things, as he is mentally still in 1867 and thinks it is still that year, so he most likely won’t understand much.

He doesn’t know what the internet or anything digital is, or the modernised language. He speaks somewhat formally, like people in 1867.