(Top panel) H I profiles for the selected positions labeled in Figure 10. F1 and F2 are located inside the candidate filaments, and the profiles are surprisingly similar, whereas the C profile is linked with the MBM 3 core. (Bottom panel) The thick pale red line is the result of subtraction between C and F1, the thick gray line is the ¹²CO emission averaged over the whole cloud, and the thin black line is CH. Note that the ¹²CO and CH are scaled to H I to better compare the line shape of atomic and molecular gas.