Thought about Syn's summoning jutsu yesterday, and what he'd summon. These are his two summons, Hibi and Kirin (left to right).

They speak like ethereal eldritch beings in that their mouths don't sync with the words they speak. Their voices are deep, distorted, and booming but honestly they don't talk too much. People expect them to dispel like worldly wisdom or something but it's usually Syn who has the quotes and wisdom.

A recurring motif with Shinobi!AU Syn is love, justice, and things coming in 2s (though he is much more complex than that). Hibi and Kirin are, supposedly, hybrids between large white wolves and tigers. All his other jutsus that involve animals have distorted hybrid animals with similar faces to Hibi and Kirin's.