MRT-chan is a fragile yet sweet young girl, with the tendency to break down when she gets upset. And when she does, her sister Bus-tan would usually stand in for her as she regains her composure. She also takes care of the youngest sister, LRT-chan, whose mobility is limited to certain places. Her hobbies include binging on EZ-Link credits as well as travelling. On a side note, she has the biggest bust size among the rest of the SG-Chans.