The "k" signifies Atk. Values are just marked on what team they happened to use at the time I checked, with me removing 2.5k for Herc and 4k for Arthur to balance things out. This can reduce or increase their stats quite significantly. For reference, I'm at 52k in Thunder (my best) and 43k in Fire (my worst).
H means Hime count. At the time of writing, there are 65+58+61=184 Hime in the gacha - there are lots of limited Hime, lots of Raid Hime and some login bonus Hime in the game as well. I don't know how many total Hime there are in the currently.
The people marked with Rudra are mostly from their profile texts - most people did not include their Eidolons there! Almost everyone on this list had at least one P2W Eidolon though.