Vandernoot found Tessa 's personality " ... very nice , " " very understanding , generous , supportive . " MacLeod appreciate that Tessa always have a way of reminding him of his humanity . In " For Evil 's Sake " , she tell a guilt @-@ ridden MacLeod that " You may be Immortal , but you 're not omnipotent ... The world is not your responsibility . " Tessa often joke about MacLeod 's immortality , for example telling him in " For Tomorrow We Die " that the last time MacLeod " ... wore a tuxedo was on the deck of the Titanic . "