Karin

Lore
''A saint of Lydia Cathedral and a pupil of William, the archbishop. She's a pacifist, but she is in chaos because of the sudden attack by the counter force. However, she calms herself down and fights bravely to protect the Lydia Cathedral.''

Special Abilities
None

Evolution Notes
Very Fast. Soulstones can be found in hero Ch.1, hero Ch.3 and hero Ch.5, all available before levels get particularly hard. There's a fourth source in hero Ch.8 but by the time you get there your Karin will most likely be well developed already.

Attributes
Base Stars: ★

Primary stat: STR

Thanks to Azrell Gnear for additional numbers.

[1] Shield of God [Buff]
Protect your army from physical attacks through a sacred shield. [ Team Shield ]

[2] Light of Salvation [Heal]
Heal the weakest man on your side. [ Single Heal ]

[3] Protection [Buff]
Temporarily protect one of your soldiers from spell attacks. [ Single Spell Damage Shield ]

[4] Aura of Protection [Buff]
Increase your entire force's resistance for physical and spell attacks. [ Team DEF Buff + Team SR Buff ]

Opinions and Tips
Karin is not so much a tank as she is a support character. Her last skill will boost your entire team's survivability by a significant margin, her shield will keep you alive longer and that single-target heal of whoever is closest to dying will fire long before Sally has time to build up charge. I really can't recommend Karin enough, there's no alternative. Opinion by AzakaZero