Mrs. Tjinder

Mrs. Tjinder first appeared informing her son that his friend had arrived ("That Sinking Feeling"). She later appeared in during the song That Christmas Feeling ("Phineas and Ferb Christmas Vacation!"). She seems to be friends with Buford's mom, Linda Flynn-Fletcher, and Irving's mom, as seen in "Not Phineas and Ferb" where her son and Buford tried to impersonate Phineas Flynn and Ferb Fletcher. She also appears in My Sweet Ride.