Same as Fig. 2a, but here showing the KDE models of the newly identified N-rich stars confined to four main groups (see text). HVNS candidates (Group #4; 2 stars) are shown as empty black star symbols for the assumed Bayesian StarHorse distances and as empty black hexagonal symbols by adopting the Bailer-Jones distances, while N-rich stars in prograde (Group #1; 72 stars), retrograde (Group #2; 25 stars), and P–R (Group #3; 25 stars) orbital configurations are represented by the gray, green, and red contours, respectively.