what type jewels do i need for this characters ?   [5]

To get an idea what jewels you should put is to refer their skill sets but there exception to the rule.
For healers, the standard is pure defense jewels for higher healing amount except for Crocus and Clara because of their 4th and should be mixed with either Atk+Element Enchance jewels, full atk jewels, or Atk+Def jewels.
Bombers are purely Attack jewels or Attack+Element Enchance jewels but there are also exception. Patreon and Lottery Mouse can heal so they can be mixed with Def+Atk or pure Defensive jewels.
Tanks and Attackers are personal preferrences so its better to read their skill first and try experimenting.
For attacker, in doubt, the safest is Attack+Speed combo jewel. For tank, in doubt, is full defensive jewel set.

Twins (Lily & Lyla): fatal + offense (since the twins are hunters based around hitting harder with Critcal attacks this will increase the damage from that)

Junia: full defense for a starting point

Santa Mary: fatal + offense / speed + offense/ elemental enchancement + offense (up to whatever you like best, all three work well)

Loli anemone: full defense for a starting point

Blondie: full attack

Lawerence: block + reduction / full defense

Octavia: elemental enchancement + offense (since she's a fire killer this will make her shred them even harder, EE increases your attack against the element your strong against by alot)

Celine: full defense (higher a healers defense is the more they can heal)

Bella: 4 attack and 2 defense is a good starting point. Later on she does well with either speed + attack or fatal + offense

Karl: fatal + offense / speed + offense (both are really good)

Papillon: block + reduction

Anemone: same as Loli

Selene: full attack or elemental enchancement + attack to hit fire hunters hard

Therapy: full defense

Joy: full defense

Put jewels with two def sub stats on healers if you can. They'll heal more. That works with the healing bombers as well. My mouse has full defence and he heals pretty well. That's why I dont need a healer in mirage with my twins as the only attacker.