Studio Trigger

Studio Trigger is a Japanese animation studio founded in August 2011 by Hiroyuki Imaishi and Masahiko Ohtsuk, former employees of Gainax.

Little Witch Academia                                                                           Kiznaiver         .

Animations by them which I am familiar with are 'Little Witch Academia' and 'Kiznaiver'. Little Witch Academia shows the comical, colourful and cartoony approach Trigger typically goes for, amazingly drawn animations with a sort of Looney Tune like style. Kiznaiver goes towards a more serious approach but still has elements of comedy and colour.

Little Witch Academia: The Enchanted Parade

Kiznaiver

Little Witch Academia Trailer:

Kiznaiver Trailer:

Other animations include 'Kill la Kill' which Trigger is well known for.