Len is probably wondering who he should be afraid of more: Tei or Rin.

Well apparently Rin learned a lot from her mother....
....speaking of which, where is she?

Rin is afraid of no one. With the possible exception Peter, but that's a given.

So the treatment for yandere is repeat concussions ?

Did some slight tune-up of the translations. Hopefully you don't mind.

If Tei starts hugging Len and acts liek an oneesan... untold tales of two women fighting shall be had.