The scene with Urza in her combat gear is when you watch the true end, which requires you to have all S rank weapons and I believe also some/all character clears.
Bottom left-most requires you to get max FR with Rocky and then see some scenes with the character that unlocks.
The missing one in nr.6 is another character that unlocks when you max FR on Tamanegi and find the character behind the locked area in insect village with the key Tamanegi gives you.
Note that talking to Tamanegi post-game will tell you which monster girl's you're missing, and all monster girl types can be found in the female prison post-game, the one that runs away can be efficiently captured by stunning it with Caloria since her stun doesn't do much damage.
Missing in 11 are, in order; True end. Arch Fiend (that pink blob with a scythe, he's a random encounter with a miniscule chance to show up and the fight ends after 3 rounds) Kakaro (fuck 200 times, do the event) Ippatsu (win 500 fights, do the event) and Hanny King (open the hidden stairs in hanny plains, get the key down there and go to the top floor of the castle in hanny village)
The only one I haven't done in this game is the fucking Arch Fiend because fuck that guy, he shows up maybe once every 200 encounters and if you don't have your A-team ready you won't have enough time to kill him.