$\color{blue}{\text{My first name}}$
$\small\bullet$ Prefix is a country, but I don't belong to there
$\small\bullet$ Infix is the name of a saint
$\small\bullet$ Suffix is a preposition
$\color{blue}{\text{My last name}}$
$\small\bullet$ It actually symbolizes my character
$\small\bullet$ Be careful! Don't get struck by it...
Who am I ?