Looks like Kalanchoe marnieriana.

I think I agree, Kalanchoe marnieriana. Needs more sunlight. The air roots are normal - and the ends will root, even in a neighboring pot! And if the roots get too unsightly, you can cut them off with no problems.

oh wow! that's so pretty! I can see mine is very leggy compared to the pictures hence needing more sunlight. Any suggesting for propagating?

As you can see in your last picture above, it will propagate by forming babies (bulbils) on the edge of the leaves. Those will fall off, root and give you more plants.

You can also do cuttings. I let them callus a day and put them in my gritty mix. They root nicely, just like most Kalanchoe do. The mother plant will also branch and be a bit fuller. I beheaded this one and you can see new side branches forming.