This here is Sir Arwin Lancington, the one who raised Lassie since she was abandoned as a pup and taught her the ways of the marksmanship. Lancington is the original "Brightening Gunslinger", earned from his famed adventures before Lassie claimed it.

His personality is like that of Mr Spock. Calm, collected, strict, friendly and loves to say anything "logical". Though he deeply loves Lassie, sometimes she can be quite too handful for him. Especially when she was young...

He was also an old rival of Lassie's father, who fought him for her mother's affection. What other secrets he holds from her is still not known...