Donatello (2012)

Character:

genius, has deep knowledge in metallurgy, physics, chemistry, biomedical sciences, engineering, biology and other fields;
prone to detail and often gets irritated when his brothers cannot keep up with him intellectually;
socially awkward, especially around April O'Neil, with whom he falls in love at first sight;
may be sarcastic, more hot-tempered and prone to panic than in previous incarnations;
He is humane and sociable with people, and cares for those whom others consider a nuisance (for example, Pulverizer and Bigfoot).

Skills and abilities:

master strategist, helps Leonardo in difficult missions;
able to calculate complex equations in his head, create machines, and create medicines and other chemical compounds;
has increased speed (can dodge laser fire) and endurance thanks to ninjutsu training;
Healing factor - able to withstand multiple blows and continue fighting.

Weapon
Donatello wields a wooden Bo staff, which can transform into a naginata (a Japanese halberd) using a retractable blade at one end. In space, he used a device similar to the Bo staff, which analyzes the severity of damage and delivers an electric shock. In Season 5's Monster arc, he used a cross-shaped tip with a stone that emits a light deadly to monsters.

Relationship
Splinter. Donatello deeply respects his mentor and adoptive father, who taught him ninjutsu and life.
April O'Neil. Donatello is in love with April, which becomes the source of his anxiety and rivalry with Casey.
Brothers. Sometimes clashes with Leonardo and Raphael due to differences in their approaches to problem solving, but understands the importance of teamwork.