He also appears very naive and reckless , making rational decisions. He is oblivious of his brother's ability for very long in the series, and has a very rocky relationship with him. We can also see him and Ruby grow apart as he realizes she has to stay in the League, and begins taking Cole's side more often. He was visibly jealous of their relationship.

In other words, Liam is a trustworthy person, and charming to those around him, able to make friends quickly