Jacob is one of the many minor characters of LEGO Friends. He has not officially appeared in any sets.
Jacob is a minor character who first makes appearances in New Girl in Town when Olivia collided with him and is her love interest who returns it. He is a little bit of a scientist, although Olivia is always better. He is Stephanie's flying partner. Stephanie, Olivia, Mia, Emma and Andrea are all friends with him. He makes Olivia blush - it's clear to see in Olivia's Science Show.