Too Cute. The Adorable Penguin has a permanent "Sanctuary" effect on it at all times.  The save DC for this is 13. If it attacks and damages a creature, that creature is immune to the effect for 1 turn.

Cold-accustomed. The Adorable Penguin has Cold Resistance.

Peck. Melee Attack Roll: +1, reach 5 ft. Hit: 1 Piercing damage. If the target is charmed by the Penguin, it has advantage on the attack roll and deals 1d4+1 piercing damage instead.

Big Eyes. As an action, the Adorable Penguin can perform a cute pose and make its own eyes go wide with innocence. All creatures within a 20' radius who can see the Adorable Penguin must make a DC 13 Wisdom save. Upon failure, they become Stunned until the end of their next turn, as well as being Charmed and Friendly to it for 1 minute. Combat has no bearing on the initial save, though the effect is broken on any affected creature that is attacked and damaged by the penguin.