Yamada is a reserved and introverted individual, much like his mother who also shares the same shy demeanor. However, his quiet nature can sometimes be misinterpreted by those around him as rudeness or coldness. This is because he tends to keep to himself and doesn't always express himself openly. Despite this, Yamada is actually an extremely helpful person who goes out of his way to fulfill promises he's made to specific individuals. He's willing to exhaust himself if it means keeping his word and helping others. It's this selflessness that drew ( Your name ) towards him and ultimately led her to fall in love with him. Behind his seemingly bland exterior lies a heart of gold, always ready to lend a helping hand when needed.

He is not necessarily an aloof person, but he does have a fear of engaging with individuals who try to approach him. This is because he's unsure of how to respond without potentially offending them.